2102 Tantalus (1975 YA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
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 Period1.46526223 yr ± 4.88e-10
Physical Parameters
H (abs. magnitude)16.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.249″
Uncertainty0
Orbit TypeApollo
MOID0.042239 AU
Observations Used1824
Radar Obs Used1
Gaia Obs Used127
Oppositions13
Arc Total1976-2026
First Observation Used1976-01-04
Last Observation Used2026-04-05
Observations (2255)
Date Type RA Dec Mag Band Observatory
2023-07-17 20:58:31 s 1 +197787.46 5 + 530.806 0.206 C57
2023-07-17 21:18:31 S 21 17 00.698 -85 29 46.57 V C57
2023-07-17 21:18:31 s 1 +198410.35 3 + 1860.213 0.879 C57
2023-07-17 21:38:31 S 21 16 39.828 -85 30 18.79 V C57
2023-07-17 21:38:31 s 1 +199026.33 3 + 3189.512 0.947 C57
2023-07-17 21:58:31 S 21 16 23.270 -85 30 52.16 V C57
2023-07-17 21:58:31 s 1 +199635.59 7 + 4518.661 0.574 C57
2023-07-17 22:18:31 S 21 16 08.899 -85 31 24.82 V C57
2023-07-17 22:18:31 s 1 +200238.12 2 + 5847.615 0.751 C57
2023-07-17 22:38:31 S 21 15 47.832 -85 31 56.89 V C57
2023-07-17 22:38:31 s 1 +200833.82 5 + 7176.327 0.423 C57
2023-07-17 23:18:31 S 21 15 07.956 -85 32 57.66 V C57
2023-07-17 23:18:31 s 1 +202005.31 0 + 9832.869 0.726 C57
2023-07-17 23:58:31 S 21 14 32.798 -85 34 10.06 V C57
2023-07-17 23:58:31 s 1 +203150.11 7 +12487.942 0.613 C57
2023-07-22 19:58:21 C 18 01 32.582 -87 38 42.04 V M22
2023-07-22 21:19:40 C 17 57 51.991 -87 38 58.56 V M22
2023-07-22 21:25:00 C 17 57 37.596 -87 38 59.35 V M22
2023-07-22 21:33:00 C 17 57 16.176 -87 39 01.01 V M22
2023-07-22 21:47:32 C 17 56 36.626 -87 39 03.24 V M22
2023-07-23 00:19:57 C 17 49 47.410 -87 39 24.91 V M22
2023-07-23 00:36:55 C 17 49 01.625 -87 39 26.57 V M22
2023-07-30 02:21:51 C 13 43 44.503 -85 21 26.28 V W68
2023-07-30 02:25:58 C 13 43 42.468 -85 21 21.38 V W68
2023-07-30 02:34:02 C 13 43 38.520 -85 21 11.45 V W68
2023-07-30 03:06:17 C 13 43 23.210 -85 20 33.43 V W68
2023-08-03 17:04:10 C 13 13 07.512 -83 21 12.42 V M22
2023-08-03 17:08:53 C 13 13 06.542 -83 21 07.20 V M22
2023-08-03 17:42:15 C 13 13 01.310 -83 20 31.96 V M22
2023-08-03 18:07:37 C 13 12 57.293 -83 20 05.57 V M22
2023-08-09 18:13:09 C 13 02 24.864 -81 06 18.50 V M22
2023-08-09 18:17:47 C 13 02 24.809 -81 06 14.62 V M22
2023-08-09 18:45:45 C 13 02 24.060 -81 05 51.25 V M22
2023-08-09 18:55:36 C 13 02 23.921 -81 05 42.25 V M22
2023-08-11 00:54:01 C 13 01 58.277 -80 41 28.64 V W68
2023-08-11 00:58:40 C 13 01 58.075 -80 41 24.68 V W68
2023-08-11 01:06:05 C 13 01 58.114 -80 41 19.00 V W68
2023-08-11 01:25:04 C 13 01 57.931 -80 41 03.01 V W68
2025-09-28 08:48:05 C 08 46 25.008 +03 20 21.52 V W68
2025-09-28 08:52:47 C 08 46 25.606 +03 20 25.76 V W68
2025-09-28 09:00:03 C 08 46 26.537 +03 20 31.85 V W68
2025-09-28 09:14:36 C 08 46 28.387 +03 20 44.05 V W68
2025-10-05 12:02:30 C 09 09 34.139 +05 57 01.98 V 703
2025-10-05 12:05:50 C 09 09 34.582 +05 57 04.75 V 703
2025-10-05 12:09:09 C 09 09 35.068 +05 57 09.32 V 703
2025-10-05 12:12:28 C 09 09 35.528 +05 57 12.31 V 703
2025-10-06 11:48:56 C 09 12 59.836 +06 20 16.19 V 703
2025-10-06 11:52:11 C 09 13 00.296 +06 20 19.00 V 703
2025-10-06 11:55:26 C 09 13 00.739 +06 20 22.70 V 703
2025-10-06 11:58:40 C 09 13 01.164 +06 20 24.11 V 703
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2017-01-04 22:03:00 169565888.79 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)