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
2010-07-06 23:27:27	S	03 36 02.03	-57 08 37.3	–	L	C51
2010-07-07 05:48:29	S	03 37 21.03	-57 11 33.9	–	L	C51
2010-07-07 08:59:00	S	03 38 00.47	-57 13 03.0	–	L	C51
2010-07-07 15:20:02	S	03 39 19.38	-57 15 57.2	–	L	C51
2010-07-07 21:41:04	S	03 40 38.15	-57 18 49.2	–	L	C51
2010-07-08 00:51:35	S	03 41 17.53	-57 20 15.5	–	L	C51
2010-07-08 07:12:37	S	03 42 36.130	-57 23 05.57	–	L	C51
2010-07-08 13:33:39	S	03 43 54.80	-57 25 56.0	–	L	C51
2010-07-08 16:44:10	S	03 44 34.10	-57 27 19.5	–	L	C51
2010-07-08 19:54:42	S	03 45 13.445	-57 28 41.23	–	L	C51
2010-07-08 23:05:12	S	03 45 52.52	-57 30 06.5	–	L	C51
2010-07-09 05:26:15	S	03 47 11.08	-57 32 52.1	–	L	C51
2010-07-09 08:36:46	S	03 47 50.251	-57 34 14.92	–	L	C51
2010-07-09 14:57:48	S	03 49 08.50	-57 36 58.2	–	L	C51
2010-07-09 14:57:59	S	03 49 08.73	-57 36 56.4	–	L	C51
2010-07-09 18:08:19	S	03 49 47.69	-57 38 18.6	–	L	C51
2010-07-09 18:08:30	S	03 49 47.67	-57 38 18.9	–	L	C51
2010-07-09 21:19:01	S	03 50 26.78	-57 39 38.9	–	L	C51
2010-07-10 00:29:32	S	03 51 05.87	-57 40 59.6	–	L	C51
2010-07-10 06:50:34	S	03 52 23.93	-57 43 39.0	–	L	C51
2010-07-10 16:22:07	S	03 54 20.93	-57 47 36.2	–	L	C51
2010-07-10 19:32:38	S	03 54 59.98	-57 48 54.1	–	L	C51
2010-07-10 22:43:09	S	03 55 38.89	-57 50 12.9	–	L	C51
2010-07-11 00:18:19	S	03 55 58.26	-57 50 51.4	–	L	C51
2010-07-11 05:04:11	S	03 56 56.70	-57 52 47.7	–	L	C51
2010-07-11 06:39:21	S	03 57 16.094	-57 53 26.16	–	L	C51
2010-07-11 06:39:32	S	03 57 16.04	-57 53 26.5	–	L	C51
2010-07-11 08:14:42	S	03 57 35.53	-57 54 04.4	–	L	C51
2010-07-11 13:00:34	S	03 58 33.74	-57 55 59.1	–	L	C51
2010-07-11 14:35:44	S	03 58 53.10	-57 56 37.5	–	L	C51
2010-07-11 16:11:05	S	03 59 12.52	-57 57 14.8	–	L	C51
2010-07-11 17:46:15	S	03 59 31.94	-57 57 53.4	–	L	C51
2010-07-11 19:21:36	S	03 59 51.34	-57 58 31.2	–	L	C51
2010-07-11 20:56:46	S	04 00 10.62	-57 59 09.3	–	L	C51
2010-07-11 22:32:07	S	04 00 30.08	-57 59 46.7	–	L	C51
2010-07-12 00:07:17	S	04 00 49.49	-58 00 24.2	–	L	C51
2010-07-12 01:42:39	S	04 01 08.77	-58 01 01.4	–	L	C51
2010-07-12 06:28:20	S	04 02 06.70	-58 02 52.5	–	L	C51
2010-07-12 12:49:22	S	04 03 24.18	-58 05 21.7	–	L	C51
2010-07-12 14:24:43	S	04 03 43.42	-58 05 57.8	–	L	C51
2010-07-12 15:59:53	S	04 04 02.58	-58 06 34.9	–	L	C51
2010-07-12 17:35:14	S	04 04 22.04	-58 07 11.0	–	L	C51
2010-07-12 19:10:24	S	04 04 41.25	-58 07 47.9	–	L	C51
2010-07-12 20:45:45	S	04 05 00.42	-58 08 24.0	–	L	C51
2010-07-12 22:20:55	S	04 05 19.91	-58 09 01.0	–	L	C51
2010-07-12 23:56:16	S	04 05 38.99	-58 09 37.4	–	L	C51
2010-07-13 06:17:18	S	04 06 56.04	-58 12 01.9	–	L	C51
2010-07-13 07:52:28	S	04 07 15.33	-58 12 38.0	–	L	C51
2010-07-13 07:52:39	S	04 07 15.25	-58 12 38.0	–	L	C51
2010-07-13 09:27:49	S	04 07 34.57	-58 13 13.4	–	L	C51

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2102 Tantalus (1975 YA)