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
2017-05-28 00:30:29 C 20 37 49.42 +30 44 14.6 q Z80
2017-05-28 00:32:13 C 20 37 49.21 +30 44 11.4 q Z80
2017-05-28 00:33:59 C 20 37 49.00 +30 44 08.8 q Z80
2017-05-28 00:35:42 C 20 37 48.79 +30 44 06.4 q Z80
2017-05-28 02:23:21 C 20 37 35.51 +30 41 20.9 q 160
2017-05-28 02:25:25 C 20 37 35.25 +30 41 17.5 q 160
2017-05-28 02:27:24 C 20 37 35.01 +30 41 14.5 q 160
2017-06-01 00:53:36 C 20 25 02.71 +27 52 02.4 q 160
2017-06-01 00:54:39 C 20 25 02.64 +27 52 01.0 q 160
2017-06-01 00:55:42 C 20 25 02.47 +27 51 58.9 q 160
2017-06-04 01:13:04 C 20 13 40.99 +25 09 34.7 q 160
2017-06-04 01:14:16 C 20 13 40.79 +25 09 31.7 q 160
2017-06-04 01:15:28 C 20 13 40.58 +25 09 28.9 q 160
2017-06-06 22:55:45 C 20 01 07.59 +21 59 00.7 q 089
2017-06-06 22:59:07 C 20 01 06.94 +21 58 50.5 q 089
2017-06-06 23:02:28 C 20 01 06.28 +21 58 40.4 q 089
2017-06-06 23:05:49 C 20 01 05.62 +21 58 30.3 q 089
2017-06-06 23:15:15 C 20 01 03.77 +21 58 02.0 q 089
2017-06-06 23:18:36 C 20 01 03.13 +21 57 52.0 q 089
2017-06-06 23:21:57 C 20 01 02.45 +21 57 42.0 q 089
2017-06-06 23:25:18 C 20 01 01.81 +21 57 32.1 q 089
2017-06-06 23:28:39 C 20 01 01.13 +21 57 21.9 q 089
2017-06-06 23:32:00 C 20 01 00.48 +21 57 12.3 q 089
2017-06-07 23:46:22 C 19 56 14.90 +20 41 50.4 q 160
2017-06-07 23:48:12 C 19 56 14.52 +20 41 44.4 q 160
2017-06-07 23:50:02 C 19 56 14.15 +20 41 38.4 q 160
2017-06-09 00:11:32 C 19 51 14.10 +19 20 48.5 q 160
2017-06-09 00:13:34 C 19 51 13.66 +19 20 41.4 q 160
2017-06-09 00:15:36 C 19 51 13.23 +19 20 34.4 q 160
2017-06-09 11:35:24 C 19 48 49.37 +18 41 18.5 L T08
2017-06-09 12:02:14 C 19 48 43.47 +18 39 44.0 L T08
2017-06-09 12:23:45 C 19 48 38.75 +18 38 28.2 L T08
2017-06-09 12:42:50 C 19 48 34.52 +18 37 20.8 L T08
2017-06-09 13:52:00 C 19 48 19.28 +18 33 14.7 L T05
2017-06-09 14:21:42 C 19 48 12.72 +18 31 29.1 L T05
2017-06-09 14:49:45 C 19 48 06.55 +18 29 49.1 L T05
2017-06-10 06:00:15 C 19 44 49.58 +17 34 38.5 q W33
2017-06-10 06:14:49 C 19 44 46.39 +17 33 44.5 q W33
2017-06-10 21:42:03 C 19 41 19.68 +16 35 16.4 q K74
2017-06-10 21:50:14 C 19 41 17.82 +16 34 45.0 q K74
2017-06-11 23:49:44 C 19 35 17.44 +14 51 29.1 q 160
2017-06-11 23:51:49 C 19 35 16.95 +14 51 20.6 q 160
2017-06-11 23:53:53 C 19 35 16.45 +14 51 12.1 q 160
2017-06-12 07:43:53 C 19 33 24.70 +14 18 48.6 u H21
2017-06-12 07:46:24 C 19 33 24.10 +14 18 38.1 u H21
2017-06-12 07:48:55 C 19 33 23.48 +14 18 27.5 u H21
2017-06-12 07:51:27 C 19 33 22.87 +14 18 17.1 u H21
2017-06-12 07:53:58 C 19 33 22.25 +14 18 06.6 u H21
2017-06-12 07:56:29 C 19 33 21.64 +14 17 55.9 u H21
2017-06-12 07:59:00 C 19 33 21.03 +14 17 45.4 u H21
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)