2102 Tantalus — IAA Minor Planet Database

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.2993501212 ± 6.46e-09
Semi-major axis (a)	1.2900609716 AU ± 2.87e-10
Inclination (i)	64.00517356° ± 3.04e-06
Long. of Asc. Node (Ω)	94.35226460° ± 4.17e-07
Arg. of Perihelion (ω)	61.49851571° ± 2.17e-06
Mean Anomaly (M)	347.35567572° ± 1.82e-06
Mean Motion (n)	0.6726620417°/day ± 2.24e-10
Perihelion dist (q)	0.90388106 AU ± 8.33e-09
Aphelion dist (Q)	1.67624088 AU ± 8.34e-09
Orbital Period	1.46526223 yr ± 4.88e-10

Physical Parameters

H (abs. magnitude)	16.00
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-05-31
RMS Residual	0.249″
Uncertainty	0
Orbit Type	Apollo
MOID	0.042239 AU
Observations Used	1824
Radar Obs Used	1
Gaia Obs Used	127
Oppositions	13
Arc Total	1976-2026
First Observation Used	1976-01-04
Last Observation Used	2026-04-05

Observations (2255)

Date	Type	RA	Dec	Mag	Band	Observatory
2010-07-13 12:38:20	S	04 08 12.89	-58 14 24.1	–	L	C51
2010-07-13 14:13:41	S	04 08 32.11	-58 15 00.2	–	L	C51
2010-07-13 15:48:51	S	04 08 51.24	-58 15 35.6	–	L	C51
2010-07-13 17:24:12	S	04 09 10.45	-58 16 10.3	–	L	C51
2010-07-13 20:34:43	S	04 09 48.76	-58 17 21.2	–	L	C51
2010-07-13 22:09:53	S	04 10 07.97	-58 17 57.1	–	L	C51
2010-07-13 23:45:14	S	04 10 27.19	-58 18 31.8	–	L	C51
2010-07-14 01:20:24	S	04 10 46.28	-58 19 06.9	–	L	C51
2010-07-14 06:06:16	S	04 11 43.62	-58 20 51.2	–	L	C51
2010-07-14 07:41:26	S	04 12 02.80	-58 21 26.1	–	L	C51
2010-07-14 09:16:47	S	04 12 21.93	-58 22 00.7	–	L	C51
2010-07-14 14:02:28	S	04 13 19.23	-58 23 43.8	–	L	C51
2010-07-14 15:37:49	S	04 13 38.18	-58 24 17.2	–	L	C51
2010-07-14 17:12:59	S	04 13 57.25	-58 24 52.7	–	L	C51
2010-07-14 18:48:20	S	04 14 16.457	-58 25 26.51	–	L	C51
2010-07-14 20:23:30	S	04 14 35.32	-58 26 00.5	–	L	C51
2010-07-14 21:58:51	S	04 14 54.35	-58 26 34.6	–	L	C51
2010-07-15 01:09:23	S	04 15 32.46	-58 27 42.2	–	L	C51
2010-07-15 05:55:04	S	04 16 29.501	-58 29 22.85	–	L	C51
2010-07-15 07:30:25	S	04 16 48.55	-58 29 56.6	–	L	C51
2010-07-15 09:05:35	S	04 17 07.50	-58 30 30.3	–	L	C51
2010-07-15 09:05:46	S	04 17 07.54	-58 30 29.4	–	L	C51
2010-07-15 12:16:06	S	04 17 45.422	-58 31 36.98	–	L	C51
2010-07-15 12:16:17	S	04 17 45.430	-58 31 35.36	–	L	C51
2010-07-15 13:51:27	S	04 18 04.32	-58 32 08.9	–	L	C51
2010-07-15 15:26:48	S	04 18 23.35	-58 32 42.4	–	L	C51
2010-07-15 17:01:58	S	04 18 42.173	-58 33 13.39	–	L	C51
2010-07-15 18:37:19	S	04 19 01.20	-58 33 49.0	–	L	C51
2010-07-15 20:12:29	S	04 19 20.05	-58 34 20.6	–	L	C51
2010-07-15 21:47:50	S	04 19 39.12	-58 34 53.9	–	L	C51
2010-07-15 23:23:00	S	04 19 57.92	-58 35 27.2	–	L	C51
2010-07-16 00:58:21	S	04 20 16.86	-58 35 59.3	–	L	C51
2010-07-16 05:44:02	S	04 21 13.51	-58 37 36.5	–	L	C51
2010-07-16 07:19:23	S	04 21 32.31	-58 38 08.5	–	L	C51
2010-07-16 08:54:33	S	04 21 51.17	-58 38 41.9	–	L	C51
2010-07-16 13:40:25	S	04 22 47.72	-58 40 18.2	–	L	C51
2010-07-16 15:15:35	S	04 23 06.44	-58 40 50.0	–	L	C51
2010-07-16 16:50:56	S	04 23 25.31	-58 41 21.2	–	L	C51
2010-07-16 18:26:06	S	04 23 44.02	-58 41 53.6	–	L	C51
2010-07-16 20:01:27	S	04 24 02.79	-58 42 25.4	–	L	C51
2010-07-16 21:36:37	S	04 24 21.73	-58 42 57.4	–	L	C51
2010-07-16 23:11:58	S	04 24 40.50	-58 43 28.7	–	L	C51
2010-07-17 00:47:08	S	04 24 59.25	-58 44 00.0	–	L	C51
2010-07-17 07:08:10	S	04 26 14.26	-58 46 04.6	–	L	C51
2010-07-17 08:43:31	S	04 26 32.93	-58 46 36.7	–	L	C51
2010-07-17 13:29:12	S	04 27 28.93	-58 48 09.6	–	L	C51
2010-07-17 13:29:23	S	04 27 28.96	-58 48 09.3	–	L	C51
2010-07-17 15:04:33	S	04 27 47.69	-58 48 39.8	–	L	C51
2010-07-17 16:39:43	S	04 28 06.19	-58 49 10.4	–	L	C51
2010-07-17 16:39:55	S	04 28 06.379	-58 49 10.16	–	L	C51

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2102 Tantalus (1975 YA)