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
2017-01-14 19:26:43 C 23 37 09.64 +38 34 04.1 q Z52
2017-01-19 01:44:52 C 23 15 36.27 +41 48 54.5 q W34
2017-01-19 02:01:26 C 23 15 33.25 +41 49 18.4 q W34
2017-01-19 02:12:51 C 23 15 31.16 +41 49 34.5 q W34
2017-01-19 02:25:06 C 23 15 28.95 +41 49 52.3 q W34
2017-01-21 00:55:44 C 23 07 34.70 +42 52 28.2 q H45
2017-01-21 00:57:06 C 23 07 34.48 +42 52 29.7 q H45
2017-01-21 00:58:30 C 23 07 34.24 +42 52 31.5 q H45
2017-01-21 01:00:40 C 23 07 33.87 +42 52 34.1 q H45
2017-01-21 01:02:18 C 23 07 33.63 +42 52 35.9 q H45
2017-01-21 01:04:27 C 23 07 33.26 +42 52 38.6 q H45
2017-01-21 05:11:20 C 23 06 53.79 +42 57 40.5 L T05
2017-01-21 05:19:52 C 23 06 52.42 +42 57 50.4 L T05
2017-01-21 05:30:40 C 23 06 50.70 +42 58 02.3 L T05
2017-01-21 05:44:20 C 23 06 48.46 +42 58 18.0 L T05
2017-01-21 17:51:54 C 23 04 55.80 +43 12 16.9 q G34
2017-01-21 17:56:08 C 23 04 55.09 +43 12 21.6 q G34
2017-01-21 18:00:22 C 23 04 54.47 +43 12 26.5 q G34
2017-01-21 18:04:36 C 23 04 53.83 +43 12 32.7 q G34
2017-01-21 18:08:50 C 23 04 53.20 +43 12 35.9 q G34
2017-01-21 18:13:05 C 23 04 52.48 +43 12 39.8 q G34
2017-01-24 17:36:16 C 22 54 48.62 +44 22 58.5 q Z52
2017-01-24 18:23:19 C 22 54 42.38 +44 23 37.3 q Z52
2017-01-24 19:12:42 C 22 54 35.88 +44 24 17.8 q Z52
2017-01-24 19:59:14 C 22 54 29.79 +44 24 55.7 q Z52
2017-01-24 20:46:33 C 22 54 23.67 +44 25 33.9 q Z52
2017-05-11 00:45:25 C 21 10 25.39 +37 35 56.2 q Z80
2017-05-11 00:50:39 C 21 10 25.26 +37 35 54.3 q Z80
2017-05-11 00:56:54 C 21 10 24.81 +37 35 49.6 q Z80
2017-05-11 01:01:57 C 21 10 24.62 +37 35 46.7 q Z80
2017-05-16 02:19:39 C 21 03 27.87 +36 07 41.8 q 160
2017-05-16 02:21:37 C 21 03 27.72 +36 07 40.6 q 160
2017-05-16 02:23:36 C 21 03 27.60 +36 07 39.1 q 160
2017-05-17 02:06:25 C 21 01 52.93 +35 47 56.4 q 160
2017-05-17 02:08:34 C 21 01 52.74 +35 47 54.7 q 160
2017-05-17 02:10:44 C 21 01 52.60 +35 47 52.8 q 160
2017-05-18 02:09:05 C 21 00 11.79 +35 26 59.1 q 160
2017-05-18 02:11:09 C 21 00 11.64 +35 26 57.1 q 160
2017-05-18 02:13:13 C 21 00 11.50 +35 26 55.5 q 160
2017-05-21 14:37:31 S 20 53 31.20 +34 04 14.6 L C51
2017-05-21 17:46:01 S 20 53 14.85 +34 00 51.4 L C51
2017-05-21 19:20:16 S 20 53 06.66 +33 59 09.1 L C51
2017-05-21 20:54:31 S 20 52 58.46 +33 57 26.4 L C51
2017-05-21 20:54:42 S 20 52 58.42 +33 57 26.5 L C51
2017-05-21 22:28:57 S 20 52 50.15 +33 55 43.8 L C51
2017-05-22 00:03:12 S 20 52 41.791 +33 54 01.22 L C51
2017-05-22 01:37:27 S 20 52 33.59 +33 52 16.9 L C51
2017-05-22 07:54:38 S 20 52 00.03 +33 45 18.7 L C51
2017-05-28 00:23:30 C 20 37 50.30 +30 44 25.0 q Z80
2017-05-28 00:28:45 C 20 37 49.63 +30 44 16.9 q Z80
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)