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
1995-06-21 11:05:53 C 18 00 03.79 +15 46 07.2 c 608
1995-06-21 11:07:15 C 18 00 03.35 +15 45 59.6 c 608
1995-06-21 11:08:30 C 18 00 02.94 +15 45 52.4 c 608
1995-06-21 11:09:42 C 18 00 02.56 +15 45 45.5 c 608
1995-06-22 11:50:04 C 17 52 22.10 +13 22 58.6 c 608
1995-06-22 11:51:38 C 17 52 21.62 +13 22 49.5 c 608
1995-06-22 11:52:54 C 17 52 21.23 +13 22 42.4 c 608
1995-06-22 11:54:05 C 17 52 20.84 +13 22 34.9 c 608
1995-06-22 11:56:07 C 17 52 20.21 +13 22 23.4 c 608
1995-06-22 12:36:08 C 17 52 07.56 +13 18 27.8 c 608
1995-06-22 12:37:24 C 17 52 07.17 +13 18 20.1 c 608
1995-06-23 04:39:14 17 47 12.64 +11 43 35.6 693
1995-06-23 05:06:04 17 47 04.23 +11 40 57.7 693
1995-06-23 09:03:29 C 17 45 51.21 +11 17 30.2 c 608
1995-06-23 09:05:06 C 17 45 50.70 +11 17 20.5 c 608
1995-06-23 09:06:21 C 17 45 50.30 +11 17 13.0 c 608
1995-06-23 11:07:48 C 17 45 12.28 +11 05 08.9 c 608
1995-06-23 11:09:00 C 17 45 11.89 +11 05 01.6 c 608
1995-06-23 11:10:16 C 17 45 11.48 +11 04 54.0 c 608
1995-06-23 11:11:37 C 17 45 11.06 +11 04 45.9 c 608
1995-06-25 07:04:15 C 17 31 57.26 +06 40 22.2 711
1995-06-25 07:09:18 C 17 31 55.72 +06 39 51.7 711
1995-06-25 21:19:18 C 17 27 45.57 +05 14 00.9 z 560
1995-06-25 21:22:54 C 17 27 44.49 +05 13 38.8 z 560
1995-06-25 21:29:47 C 17 27 42.49 +05 12 57.2 z 560
1995-06-25 21:33:19 C 17 27 41.41 +05 12 35.7 z 560
1995-06-25 21:58:00 C 17 27 34.13 +05 10 05.7 476
1995-06-25 22:07:39 C 17 27 31.43 +05 09 07.9 476
1995-06-25 22:18:09 C 17 27 28.14 +05 08 04.9 476
1995-06-26 21:56:30 C 17 20 37.23 +02 45 23.7 476
1995-06-26 22:04:49 C 17 20 34.61 +02 44 38.1 476
1995-06-27 23:46:00 17 13 18.10 +00 11 15.6 m 026
1995-06-28 02:57:55 C 17 12 25.35 -00 07 37.4 z 801
1995-06-28 02:59:33 C 17 12 24.88 -00 07 47.0 z 801
1995-06-28 05:29:09 C 17 11 42.66 -00 22 29.7 z 816
1995-06-28 05:32:56 C 17 11 41.59 -00 22 52.4 z 816
1995-06-28 05:34:09 C 17 11 41.23 -00 22 59.3 z 816
1995-06-28 05:36:10 C 17 11 40.67 -00 23 11.1 z 816
1995-06-28 05:42:51 C 17 11 38.78 -00 23 50.6 z 816
1995-06-28 23:09:04 C 17 06 52.17 -02 05 47.6 118
1995-06-28 23:41:17 C 17 06 43.30 -02 08 54.4 118
1995-06-29 00:07:37 C 17 06 36.07 -02 11 26.7 118
1995-06-29 03:06:34 C 17 05 48.50 -02 28 40.0 z 801
1995-06-29 03:08:23 C 17 05 48.02 -02 28 50.4 z 801
1995-06-29 21:39:18 C 17 00 51.71 -04 14 43.3 z 540
1995-06-29 21:39:53 C 17 00 51.50 -04 14 46.7 118
1995-06-29 21:41:14 C 17 00 51.19 -04 14 54.2 z 540
1995-06-29 21:42:58 C 17 00 50.72 -04 15 04.0 z 540
1995-06-29 21:59:18 C 17 00 46.28 -04 16 36.4 118
1995-06-29 22:17:49 C 17 00 41.30 -04 18 21.3 118
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)