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
2011-06-26 22:13:03 C 13 38 05.03 +60 11 12.0 c A24
2011-06-27 20:03:49 C 13 40 38.60 +58 42 56.5 u B38
2011-06-27 20:10:39 C 13 40 39.36 +58 42 29.1 u B38
2011-06-27 20:18:42 C 13 40 40.33 +58 41 55.8 u B38
2011-06-27 20:25:48 C 13 40 41.05 +58 41 26.3 u B38
2011-06-27 20:33:38 C 13 40 41.92 +58 40 54.1 u B38
2011-06-27 21:20:40 C 13 40 47.09 +58 37 41.9 c A24
2011-06-27 21:21:45 C 13 40 47.20 +58 37 37.5 c A24
2011-06-27 22:20:39 C 13 40 53.68 +58 33 35.7 c A24
2011-06-27 22:21:43 C 13 40 53.77 +58 33 31.3 c A24
2011-07-03 06:14:53 C 13 53 19.453 +49 29 35.78 L F51
2011-07-03 06:31:06 C 13 53 20.721 +49 28 24.29 L F51
2011-07-03 06:49:41 C 13 53 22.202 +49 27 02.47 L F51
2011-07-03 19:58:47 C 13 54 28.04 +48 28 54.8 u B38
2011-07-03 20:05:41 C 13 54 28.57 +48 28 24.6 u B38
2011-07-03 20:12:52 C 13 54 29.12 +48 27 52.8 u B38
2011-07-03 20:20:21 C 13 54 29.73 +48 27 19.2 u B38
2011-07-03 20:27:36 C 13 54 30.28 +48 26 47.5 u B38
2011-07-05 20:11:30 C 13 58 16.89 +44 53 56.1 a 233
2011-07-05 20:16:43 C 13 58 17.18 +44 53 31.5 a 233
2011-07-05 20:20:30 C 13 58 17.53 +44 53 14.7 a 233
2011-07-06 02:05:13 C 13 58 43.44 +44 27 26.2 u I15
2011-07-06 02:08:32 C 13 58 43.74 +44 27 11.3 u I15
2011-07-06 02:11:50 C 13 58 43.97 +44 26 55.8 u I15
2011-07-06 19:59:57 C 14 00 03.50 +43 06 44.5 u B38
2011-07-06 20:08:11 C 14 00 04.09 +43 06 07.3 u B38
2011-07-06 20:17:46 C 14 00 04.75 +43 05 24.3 u B38
2011-07-22 21:00:17 C 14 23 29.68 +15 13 44.3 w I99
2011-07-22 21:09:47 C 14 23 30.12 +15 13 07.9 w I99
2011-07-22 21:18:27 C 14 23 30.60 +15 12 33.6 w I99
2011-07-23 01:50:26 C 14 23 45.24 +14 54 50.5 u I15
2011-07-23 01:55:18 C 14 23 45.47 +14 54 32.0 u I15
2011-07-23 01:58:32 C 14 23 45.69 +14 54 18.8 u I15
2013-11-08 08:36:16 C 07 40 58.10 -63 30 37.5 u 807
2013-11-08 08:39:53 C 07 40 57.80 -63 30 39.6 u 807
2013-11-08 08:43:31 C 07 40 57.49 -63 30 41.7 u 807
2013-11-08 08:47:09 C 07 40 57.17 -63 30 43.8 u 807
2013-12-15 02:31:15 C 04 18 54.00 -62 26 37.4 u 807
2013-12-15 02:34:28 C 04 18 52.96 -62 26 32.2 u 807
2013-12-15 02:37:23 C 04 18 52.02 -62 26 27.2 u 807
2013-12-15 02:41:41 C 04 18 50.63 -62 26 20.0 u 807
2013-12-15 02:46:23 C 04 18 49.14 -62 26 12.2 u 807
2013-12-15 02:51:05 C 04 18 47.64 -62 26 04.4 u 807
2013-12-21 01:59:23 C 03 36 50.342 -57 20 09.07 o 844
2013-12-21 02:08:35 C 03 36 47.822 -57 19 44.55 o 844
2013-12-21 02:13:20 C 03 36 46.458 -57 19 31.79 o 844
2013-12-22 00:51:16 C 03 30 47.620 -56 18 55.96 o 844
2013-12-22 00:55:48 C 03 30 46.382 -56 18 43.67 o 844
2013-12-22 01:00:17 C 03 30 45.245 -56 18 31.21 o 844
2013-12-22 01:04:48 C 03 30 44.069 -56 18 19.06 o 844
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)