2019 UO₁₄

First confirmed Saturnian trojan

2019 UO₁₄
Discovery
Discovered by	Pan-STARRS 1
Discovery site	Haleakala, Hawaii
Discovery date	23 October 2019
Designations
Minor planet category	Saturn trojan (L₄)^[1] centaur ^[1]
Orbital characteristics
Epoch 17 October 2024 (JD 2458770.8)
Uncertainty parameter 1
Observation arc	3205 days
Aphelion	12.110 AU
Perihelion	7.4846 AU
Semi-major axis	9.797 AU
Eccentricity	0.236
Mean anomaly	58.80761°
Mean motion	0.03214010°/day
Inclination	32.828°
Earth MOID	6.54192 AU
Jupiter MOID	2.69283 AU
Saturn MOID	1.20089 AU
Physical characteristics
Mean diameter	~12 km
Absolute magnitude (H)	13.31-13.35

2019 UO₁₄ is the first ever confirmed Saturnian trojan,^[1] orbiting the Sun around the L₄ Lagrangian point. It was discovered on 23 October 2019 by the Pan-STARRS 1 telescope at Haleakala, Hawaii.^[2] The object was captured probably a few thousand years ago, and will remain there for 1,000 more years until influences from other outer planets remove 2019 UO₁₄ from its current trojan orbit.

Orbit

[edit ]

Before Saturn captured 2019 UO₁₄, it was floating around the Solar System as a centaur. 2,000 years ago, Saturn trapped the centaur in its L₄ point, making it into a trojan. However, due to continuous pulling from Jupiter and Uranus, eventually 2019 UO₁₄ would be ejected from its trojan orbit. It is suggested that there will be more Saturnian trojans to be discovered, since Saturn has a large gravitational pull.^[3]

References

[edit ]

^ ^a ^b ^c Hui, Man-To; Wiegert, Paul A.; et al. (September 2024). "2019 UO14: A Transient Trojan of Saturn". arXiv:2409.19725 [astro-ph.EP].
^ "IAU Minor Planet Center". minorplanetcenter.net. Retrieved 2024年10月26日.
^ Yirka, Bob; Phys.org. "Saturn Trojan asteroid confirmed". phys.org. Retrieved 2024年10月29日.

Sources

[edit ]

Hui 許, Man-To 文韜; Wiegert, Paul A.; Weryk, Robert; Micheli, Marco; Tholen, David J.; Deen, Sam; Walker, Andrew J.; Wainscoat, Richard (2024年11月01日). "2019 UO 14: A Transient Trojan of Saturn". The Astrophysical Journal Letters. 975 (1): L3. doi:10.3847/2041-8213/ad84ef . ISSN 2041-8205.
Pan, Nicolas; Gallardo, Tabaré (2025). "An attempt to build a dynamical catalog of present-day solar system co-orbitals". Celestial Mechanics and Dynamical Astronomy. 137 2. arXiv:2410.20015 . doi:10.1007/s10569-024-10234-y.

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Moons of Saturn

Listed in approximate increasing distance from Saturn

Ring moonlets

Ring shepherds

Alkyonides

Large moons
(with trojans)

Inuit group (36)

Kiviuq subgroup (20)	S/2023 S 1 S/2019 S 1 S/2004 S 54 S/2004 S 55 S/2020 S 11 S/2019 S 22 Kiviuq S/2023 S 2 S/2019 S 23 S/2020 S 12 S/2005 S 4 S/2019 S 25 S/2020 S 1 Ijiraq S/2019 S 24 S/2007 S 10 S/2019 S 26 S/2020 S 13 S/2023 S 6 S/2023 S 7
Paaliaq	Paaliaq
Siarnaq subgroup (15)	S/2004 S 31 S/2023 S 19 S/2023 S 3 S/2020 S 19 Tarqeq S/2019 S 14 Siarnaq S/2019 S 32 S/2020 S 3 S/2005 S 6 S/2019 S 6 S/2004 S 58 S/2006 S 23 S/2020 S 5 S/2023 S 22

Gallic group (17)

Albiorix
S/2020 S 15
Bebhionn
S/2007 S 8
Saturn LX
S/2019 S 29
S/2023 S 18
S/2023 S 17
S/2007 S 11
Erriapus
S/2019 S 31
Tarvos
S/2020 S 4
S/2019 S 34
S/2005 S 7
S/2006 S 12
S/2004 S 24

Norse group (197)

Low-inclination (12)	S/2023 S 38 Skathi S/2020 S 17 S/2023 S 20 S/2023 S 30 Hyrrokkin Narvi S/2019 S 37 Bestla S/2019 S 11 S/2020 S 27 S/2023 S 46
Kari subgroup (15)	S/2006 S 1 S/2004 S 45 S/2023 S 27 S/2006 S 3 S/2023 S 33 S/2020 S 30 Kari Geirrod S/2019 S 17 S/2019 S 19 S/2019 S 18 S/2004 S 21 S/2004 S 36 S/2019 S 20 S/2006 S 29
Mundilfari subgroup (143)	S/2023 S 50 S/2023 S 9 S/2004 S 56 S/2023 S 8 S/2023 S 11 S/2006 S 21 S/2006 S 22 S/2023 S 13 S/2023 S 10 S/2023 S 12 S/2007 S 5 S/2007 S 7 S/2004 S 37 S/2004 S 47 S/2004 S 40 S/2020 S 14 S/2019 S 27 S/2023 S 14 S/2020 S 16 S/2023 S 16 S/2019 S 3 S/2020 S 7 S/2019 S 28 Skoll S/2019 S 30 S/2023 S 21 S/2023 S 4 S/2020 S 18 S/2020 S 2 S/2019 S 4 S/2020 S 20 S/2004 S 41 S/2004 S 57 S/2006 S 24 S/2004 S 42 S/2023 S 15 S/2023 S 24 S/2004 S 13 S/2007 S 6 S/2019 S 35 S/2006 S 25 Mundilfari S/2006 S 26 S/2019 S 33 S/2023 S 23 S/2020 S 21 S/2004 S 43 S/2006 S 10 S/2019 S 5 S/2023 S 25 S/2004 S 59 S/2006 S 27 Gridr Bergelmir Jarnsaxa S/2023 S 44 S/2020 S 22 S/2004 S 44 Hati S/2004 S 17 S/2004 S 12 S/2020 S 23 Eggther S/2023 S 28 S/2023 S 37 S/2023 S 26 S/2019 S 36 S/2006 S 13 S/2023 S 48 S/2023 S 29 S/2007 S 9 Farbauti S/2019 S 9 S/2023 S 32 S/2020 S 24 Aegir S/2019 S 10 Beli S/2023 S 31 S/2020 S 25 S/2023 S 34 S/2023 S 39 S/2019 S 12 S/2004 S 61 S/2006 S 14 S/2023 S 40 Gunnlod S/2019 S 15 S/2020 S 6 S/2020 S 26 S/2023 S 41 S/2004 S 7 S/2005 S 5 S/2006 S 16 S/2023 S 49 S/2006 S 15 S/2023 S 42 S/2004 S 28 S/2020 S 32 S/2020 S 8 S/2020 S 28 S/2019 S 38 S/2004 S 48 S/2023 S 36 S/2023 S 35 S/2020 S 29 Fenrir S/2004 S 50 S/2006 S 17 S/2004 S 49 S/2020 S 34 S/2020 S 31 S/2023 S 43 Surtur S/2006 S 18 S/2020 S 36 Loge S/2020 S 33 S/2004 S 39 S/2019 S 16 S/2004 S 53 S/2023 S 45 Thiazzi S/2020 S 38 S/2020 S 40 S/2019 S 40 S/2019 S 42 Saturn LXIV S/2020 S 39 S/2019 S 41 Fornjot S/2023 S 47 S/2004 S 51 S/2020 S 10 S/2020 S 42 S/2020 S 9 S/2023 S 5 S/2020 S 41 S/2019 S 21 S/2004 S 52 S/2020 S 43 S/2019 S 43 S/2020 S 44
Phoebe subgroup (27)	Phoebe S/2006 S 20 S/2006 S 9 S/2007 S 2 S/2019 S 2 Greip Suttungr S/2004 S 60 S/2007 S 3 S/2006 S 11 S/2019 S 7 S/2019 S 8 Thrymr S/2004 S 46 Angrboda Gerd S/2019 S 13 Skrymir S/2006 S 28 Alvaldi Ymir S/2020 S 35 S/2020 S 37 S/2019 S 39 S/2006 S 19 Saturn LVIII S/2019 S 44

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2019 UO14 (First confirmed Saturnian trojan)
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Orbit

See also

References

Sources