Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution

In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether...
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Autor*in:	Larissa Markwardt [verfasserIn] Hsing Wen Lin [verfasserIn] David Gerdes [verfasserIn] Fred C. Adams [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Trojan asteroids Neptune trojans Multi-color photometry CCD photometry

Übergeordnetes Werk:	In: The Planetary Science Journal - IOP Publishing, 2021, 4(2023), 8, p 135
Übergeordnetes Werk:	volume:4 ; year:2023 ; number:8, p 135

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3847/PSJ/ace528

Katalog-ID:	DOAJ094990328

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520			\|a In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether or not the Kuiper Belt has a color distribution consistent with the NT population, as would be expected if it were the source population. In this work, we present a new photometric survey of 15 out of 31 NTs. We utilized the Sloan $g^{\prime} r^{\prime} i^{\prime} z^{\prime} $ filters on the IMACS f/4 instrument, which is mounted on the 6.5 m Baade telescope. In this survey, we identify four NTs as being ultrared using a principal component analysis. This result brings the ratio of red to ultrared NTs to 7.75:1, more consistent with the corresponding trans-Neptunian object ratio of 4–11:1. We also identify three targets as being blue (nearly solar) in color. Such objects may be C-type surfaces, but we see more of these blue NTs than has been observed in the Kuiper Belt. Finally, we show that there are hints of a color-absolute magnitude (H) correlation, with larger H (smaller sized, lower albedo) tending to be more red, but more data are needed to confirm this result. The origin of such a correlation remains an open question that will be addressed by future observations of the surface composition of these targets and their rotational properties.
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allfields	10.3847/PSJ/ace528 doi (DE-627)DOAJ094990328 (DE-599)DOAJ05ede02a94ff4363851180bf18892ad2 DE-627 ger DE-627 rakwb eng QB1-991 Larissa Markwardt verfasserin aut Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether or not the Kuiper Belt has a color distribution consistent with the NT population, as would be expected if it were the source population. In this work, we present a new photometric survey of 15 out of 31 NTs. We utilized the Sloan $g^{\prime} r^{\prime} i^{\prime} z^{\prime} $ filters on the IMACS f/4 instrument, which is mounted on the 6.5 m Baade telescope. In this survey, we identify four NTs as being ultrared using a principal component analysis. This result brings the ratio of red to ultrared NTs to 7.75:1, more consistent with the corresponding trans-Neptunian object ratio of 4–11:1. We also identify three targets as being blue (nearly solar) in color. Such objects may be C-type surfaces, but we see more of these blue NTs than has been observed in the Kuiper Belt. Finally, we show that there are hints of a color-absolute magnitude (H) correlation, with larger H (smaller sized, lower albedo) tending to be more red, but more data are needed to confirm this result. The origin of such a correlation remains an open question that will be addressed by future observations of the surface composition of these targets and their rotational properties. Trojan asteroids Neptune trojans Multi-color photometry CCD photometry Astronomy Hsing Wen Lin verfasserin aut David Gerdes verfasserin aut Fred C. Adams verfasserin aut In The Planetary Science Journal IOP Publishing, 2021 4(2023), 8, p 135 (DE-627)1697764495 (DE-600)3021068-9 26323338 nnns volume:4 year:2023 number:8, p 135 https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/article/05ede02a94ff4363851180bf18892ad2 kostenfrei https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/toc/2632-3338 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 8, p 135
spelling	10.3847/PSJ/ace528 doi (DE-627)DOAJ094990328 (DE-599)DOAJ05ede02a94ff4363851180bf18892ad2 DE-627 ger DE-627 rakwb eng QB1-991 Larissa Markwardt verfasserin aut Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether or not the Kuiper Belt has a color distribution consistent with the NT population, as would be expected if it were the source population. In this work, we present a new photometric survey of 15 out of 31 NTs. We utilized the Sloan $g^{\prime} r^{\prime} i^{\prime} z^{\prime} $ filters on the IMACS f/4 instrument, which is mounted on the 6.5 m Baade telescope. In this survey, we identify four NTs as being ultrared using a principal component analysis. This result brings the ratio of red to ultrared NTs to 7.75:1, more consistent with the corresponding trans-Neptunian object ratio of 4–11:1. We also identify three targets as being blue (nearly solar) in color. Such objects may be C-type surfaces, but we see more of these blue NTs than has been observed in the Kuiper Belt. Finally, we show that there are hints of a color-absolute magnitude (H) correlation, with larger H (smaller sized, lower albedo) tending to be more red, but more data are needed to confirm this result. The origin of such a correlation remains an open question that will be addressed by future observations of the surface composition of these targets and their rotational properties. Trojan asteroids Neptune trojans Multi-color photometry CCD photometry Astronomy Hsing Wen Lin verfasserin aut David Gerdes verfasserin aut Fred C. Adams verfasserin aut In The Planetary Science Journal IOP Publishing, 2021 4(2023), 8, p 135 (DE-627)1697764495 (DE-600)3021068-9 26323338 nnns volume:4 year:2023 number:8, p 135 https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/article/05ede02a94ff4363851180bf18892ad2 kostenfrei https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/toc/2632-3338 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 8, p 135
allfields_unstemmed	10.3847/PSJ/ace528 doi (DE-627)DOAJ094990328 (DE-599)DOAJ05ede02a94ff4363851180bf18892ad2 DE-627 ger DE-627 rakwb eng QB1-991 Larissa Markwardt verfasserin aut Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether or not the Kuiper Belt has a color distribution consistent with the NT population, as would be expected if it were the source population. In this work, we present a new photometric survey of 15 out of 31 NTs. We utilized the Sloan $g^{\prime} r^{\prime} i^{\prime} z^{\prime} $ filters on the IMACS f/4 instrument, which is mounted on the 6.5 m Baade telescope. In this survey, we identify four NTs as being ultrared using a principal component analysis. This result brings the ratio of red to ultrared NTs to 7.75:1, more consistent with the corresponding trans-Neptunian object ratio of 4–11:1. We also identify three targets as being blue (nearly solar) in color. Such objects may be C-type surfaces, but we see more of these blue NTs than has been observed in the Kuiper Belt. Finally, we show that there are hints of a color-absolute magnitude (H) correlation, with larger H (smaller sized, lower albedo) tending to be more red, but more data are needed to confirm this result. The origin of such a correlation remains an open question that will be addressed by future observations of the surface composition of these targets and their rotational properties. Trojan asteroids Neptune trojans Multi-color photometry CCD photometry Astronomy Hsing Wen Lin verfasserin aut David Gerdes verfasserin aut Fred C. Adams verfasserin aut In The Planetary Science Journal IOP Publishing, 2021 4(2023), 8, p 135 (DE-627)1697764495 (DE-600)3021068-9 26323338 nnns volume:4 year:2023 number:8, p 135 https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/article/05ede02a94ff4363851180bf18892ad2 kostenfrei https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/toc/2632-3338 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 8, p 135
allfieldsGer	10.3847/PSJ/ace528 doi (DE-627)DOAJ094990328 (DE-599)DOAJ05ede02a94ff4363851180bf18892ad2 DE-627 ger DE-627 rakwb eng QB1-991 Larissa Markwardt verfasserin aut Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether or not the Kuiper Belt has a color distribution consistent with the NT population, as would be expected if it were the source population. In this work, we present a new photometric survey of 15 out of 31 NTs. We utilized the Sloan $g^{\prime} r^{\prime} i^{\prime} z^{\prime} $ filters on the IMACS f/4 instrument, which is mounted on the 6.5 m Baade telescope. In this survey, we identify four NTs as being ultrared using a principal component analysis. This result brings the ratio of red to ultrared NTs to 7.75:1, more consistent with the corresponding trans-Neptunian object ratio of 4–11:1. We also identify three targets as being blue (nearly solar) in color. Such objects may be C-type surfaces, but we see more of these blue NTs than has been observed in the Kuiper Belt. Finally, we show that there are hints of a color-absolute magnitude (H) correlation, with larger H (smaller sized, lower albedo) tending to be more red, but more data are needed to confirm this result. The origin of such a correlation remains an open question that will be addressed by future observations of the surface composition of these targets and their rotational properties. Trojan asteroids Neptune trojans Multi-color photometry CCD photometry Astronomy Hsing Wen Lin verfasserin aut David Gerdes verfasserin aut Fred C. Adams verfasserin aut In The Planetary Science Journal IOP Publishing, 2021 4(2023), 8, p 135 (DE-627)1697764495 (DE-600)3021068-9 26323338 nnns volume:4 year:2023 number:8, p 135 https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/article/05ede02a94ff4363851180bf18892ad2 kostenfrei https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/toc/2632-3338 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 8, p 135
allfieldsSound	10.3847/PSJ/ace528 doi (DE-627)DOAJ094990328 (DE-599)DOAJ05ede02a94ff4363851180bf18892ad2 DE-627 ger DE-627 rakwb eng QB1-991 Larissa Markwardt verfasserin aut Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether or not the Kuiper Belt has a color distribution consistent with the NT population, as would be expected if it were the source population. In this work, we present a new photometric survey of 15 out of 31 NTs. We utilized the Sloan $g^{\prime} r^{\prime} i^{\prime} z^{\prime} $ filters on the IMACS f/4 instrument, which is mounted on the 6.5 m Baade telescope. In this survey, we identify four NTs as being ultrared using a principal component analysis. This result brings the ratio of red to ultrared NTs to 7.75:1, more consistent with the corresponding trans-Neptunian object ratio of 4–11:1. We also identify three targets as being blue (nearly solar) in color. Such objects may be C-type surfaces, but we see more of these blue NTs than has been observed in the Kuiper Belt. Finally, we show that there are hints of a color-absolute magnitude (H) correlation, with larger H (smaller sized, lower albedo) tending to be more red, but more data are needed to confirm this result. The origin of such a correlation remains an open question that will be addressed by future observations of the surface composition of these targets and their rotational properties. Trojan asteroids Neptune trojans Multi-color photometry CCD photometry Astronomy Hsing Wen Lin verfasserin aut David Gerdes verfasserin aut Fred C. Adams verfasserin aut In The Planetary Science Journal IOP Publishing, 2021 4(2023), 8, p 135 (DE-627)1697764495 (DE-600)3021068-9 26323338 nnns volume:4 year:2023 number:8, p 135 https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/article/05ede02a94ff4363851180bf18892ad2 kostenfrei https://doi.org/10.3847/PSJ/ace528 kostenfrei https://doaj.org/toc/2632-3338 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 4 2023 8, p 135
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callnumber-first	Q - Science
author	Larissa Markwardt
spellingShingle	Larissa Markwardt misc QB1-991 misc Trojan asteroids misc Neptune trojans misc Multi-color photometry misc CCD photometry misc Astronomy Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution
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topic_title	QB1-991 Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution Trojan asteroids Neptune trojans Multi-color photometry CCD photometry
topic	misc QB1-991 misc Trojan asteroids misc Neptune trojans misc Multi-color photometry misc CCD photometry misc Astronomy
topic_unstemmed	misc QB1-991 misc Trojan asteroids misc Neptune trojans misc Multi-color photometry misc CCD photometry misc Astronomy
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title	Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution
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title_full	Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution
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title_sort	photometric survey of neptune's trojan asteroids. i. the color distribution
callnumber	QB1-991
title_auth	Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution
abstract	In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether or not the Kuiper Belt has a color distribution consistent with the NT population, as would be expected if it were the source population. In this work, we present a new photometric survey of 15 out of 31 NTs. We utilized the Sloan $g^{\prime} r^{\prime} i^{\prime} z^{\prime} $ filters on the IMACS f/4 instrument, which is mounted on the 6.5 m Baade telescope. In this survey, we identify four NTs as being ultrared using a principal component analysis. This result brings the ratio of red to ultrared NTs to 7.75:1, more consistent with the corresponding trans-Neptunian object ratio of 4–11:1. We also identify three targets as being blue (nearly solar) in color. Such objects may be C-type surfaces, but we see more of these blue NTs than has been observed in the Kuiper Belt. Finally, we show that there are hints of a color-absolute magnitude (H) correlation, with larger H (smaller sized, lower albedo) tending to be more red, but more data are needed to confirm this result. The origin of such a correlation remains an open question that will be addressed by future observations of the surface composition of these targets and their rotational properties.
abstractGer	In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether or not the Kuiper Belt has a color distribution consistent with the NT population, as would be expected if it were the source population. In this work, we present a new photometric survey of 15 out of 31 NTs. We utilized the Sloan $g^{\prime} r^{\prime} i^{\prime} z^{\prime} $ filters on the IMACS f/4 instrument, which is mounted on the 6.5 m Baade telescope. In this survey, we identify four NTs as being ultrared using a principal component analysis. This result brings the ratio of red to ultrared NTs to 7.75:1, more consistent with the corresponding trans-Neptunian object ratio of 4–11:1. We also identify three targets as being blue (nearly solar) in color. Such objects may be C-type surfaces, but we see more of these blue NTs than has been observed in the Kuiper Belt. Finally, we show that there are hints of a color-absolute magnitude (H) correlation, with larger H (smaller sized, lower albedo) tending to be more red, but more data are needed to confirm this result. The origin of such a correlation remains an open question that will be addressed by future observations of the surface composition of these targets and their rotational properties.
abstract_unstemmed	In 2018, Jewitt identified the “The Trojan Color Conundrum,” namely that Neptune's Trojan asteroids (NTs) had no ultrared members, unlike the the nearby Kuiper Belt. Since then, numerous ultrared NTs have been discovered, seemingly resolving this conundrum. However, it is still unclear whether or not the Kuiper Belt has a color distribution consistent with the NT population, as would be expected if it were the source population. In this work, we present a new photometric survey of 15 out of 31 NTs. We utilized the Sloan $g^{\prime} r^{\prime} i^{\prime} z^{\prime} $ filters on the IMACS f/4 instrument, which is mounted on the 6.5 m Baade telescope. In this survey, we identify four NTs as being ultrared using a principal component analysis. This result brings the ratio of red to ultrared NTs to 7.75:1, more consistent with the corresponding trans-Neptunian object ratio of 4–11:1. We also identify three targets as being blue (nearly solar) in color. Such objects may be C-type surfaces, but we see more of these blue NTs than has been observed in the Kuiper Belt. Finally, we show that there are hints of a color-absolute magnitude (H) correlation, with larger H (smaller sized, lower albedo) tending to be more red, but more data are needed to confirm this result. The origin of such a correlation remains an open question that will be addressed by future observations of the surface composition of these targets and their rotational properties.
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Photometric Survey of Neptune's Trojan Asteroids. I. The Color Distribution

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