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
2017-06-17 07:02:08 C 19 02 31.75 +04 53 55.1 u H21
2017-06-17 07:04:39 C 19 02 31.03 +04 53 41.8 u H21
2017-06-18 00:23:43 C 18 57 39.61 +03 21 41.1 15.7 d B66
2017-06-18 01:12:40 C 18 57 25.49 +03 17 18.2 q 160
2017-06-18 01:14:44 C 18 57 24.89 +03 17 07.1 q 160
2017-06-18 01:16:49 C 18 57 24.28 +03 16 55.9 q 160
2017-06-18 01:20:38 C 18 57 23.22 +03 16 35.4 15.5 d B66
2017-06-18 01:58:15 C 18 57 12.37 +03 13 12.8 15.6 d B66
2017-06-18 02:29:26 C 18 57 03.35 +03 10 24.5 15.6 d B66
2017-06-18 13:39:12 C 18 53 54.09 +02 09 57.9 o P93
2017-06-18 13:40:32 C 18 53 53.63 +02 09 49.5 o P93
2017-06-18 21:46:23 C 18 51 34.08 +01 25 26.1 15.2 q 006
2017-06-18 21:48:23 C 18 51 33.50 +01 25 14.9 15.2 q 006
2017-06-18 21:50:24 C 18 51 32.92 +01 25 04.2 15.2 q 006
2017-06-18 21:51:53 C 18 51 32.49 +01 24 55.1 15.7 q 006
2017-06-18 21:53:23 C 18 51 32.04 +01 24 47.7 15.3 q 006
2017-06-18 22:05:38 C 18 51 28.46 +01 23 38.9 15.5 q Z43
2017-06-18 22:25:28 C 18 51 22.43 +01 21 48.3 q K74
2017-06-18 22:29:23 C 18 51 21.25 +01 21 26.7 q K74
2017-06-18 22:32:19 C 18 51 20.40 +01 21 10.8 q K74
2017-06-18 22:35:00 C 18 51 19.89 +01 20 56.4 15.5 q Z43
2017-06-18 23:11:43 C 18 51 08.88 +01 17 35.5 q 160
2017-06-18 23:13:42 C 18 51 08.30 +01 17 24.6 q 160
2017-06-18 23:15:40 C 18 51 07.72 +01 17 13.7 q 160
2017-06-19 11:54:11 C 18 47 26.94 +00 07 18.0 L T08
2017-06-19 12:07:22 C 18 47 23.00 +00 06 04.6 L T08
2017-06-19 12:21:24 C 18 47 18.80 +00 04 46.2 L T08
2017-06-19 12:34:37 C 18 47 14.85 +00 03 32.6 L T08
2017-06-19 23:20:10 C 18 44 06.43 -00 56 52.6 q 160
2017-06-19 23:22:28 C 18 44 05.74 -00 57 05.6 q 160
2017-06-19 23:24:35 C 18 44 05.11 -00 57 17.5 q 160
2017-06-20 23:57:38 C 18 36 47.71 -03 16 25.2 q 160
2017-06-20 23:59:37 C 18 36 47.11 -03 16 36.5 q 160
2017-06-21 00:01:37 C 18 36 46.50 -03 16 48.0 q 160
2017-06-21 21:57:46 C 18 30 10.99 -05 22 21.1 U G34
2017-06-21 22:01:58 C 18 30 09.70 -05 22 45.2 U G34
2017-06-21 22:06:10 C 18 30 08.41 -05 23 09.6 U G34
2017-06-21 22:10:22 C 18 30 07.12 -05 23 32.9 U G34
2017-06-21 22:26:08 C 18 30 02.57 -05 25 01.0 15.0 q 006
2017-06-21 22:28:08 C 18 30 01.93 -05 25 12.4 15.4 q 006
2017-06-21 22:30:08 C 18 30 01.32 -05 25 24.0 15.5 q 006
2017-06-21 22:32:42 C 18 30 00.50 -05 25 38.3 15.5 q 006
2017-06-21 22:34:46 C 18 29 59.90 -05 25 50.2 15.4 q 006
2017-06-23 01:29:44 C 18 21 47.86 -08 00 12.2 c J04
2017-06-23 01:46:34 C 18 21 42.60 -08 01 48.6 c J04
2017-06-23 02:03:24 C 18 21 37.34 -08 03 25.0 c J04
2017-06-23 02:20:14 C 18 21 32.07 -08 05 01.4 c J04
2017-06-23 02:33:57 C 18 21 28.52 -08 05 59.0 r Y00
2017-06-23 02:35:18 C 18 21 28.10 -08 06 05.9 r Y00
2017-06-23 02:37:14 C 18 21 27.44 -08 06 19.0 r Y00
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)