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
2010-07-17 18:15:05 S 04 28 25.13 -58 49 42.4 L C51
2010-07-17 19:50:15 S 04 28 43.71 -58 50 12.0 L C51
2010-07-17 19:50:26 S 04 28 43.78 -58 50 12.3 L C51
2010-07-17 21:25:36 S 04 29 02.41 -58 50 43.3 L C51
2010-07-17 23:00:46 S 04 29 21.02 -58 51 13.1 L C51
2010-07-17 23:00:57 S 04 29 21.00 -58 51 13.7 L C51
2010-07-18 00:36:07 S 04 29 39.60 -58 51 44.0 L C51
2010-07-18 05:21:59 S 04 30 35.48 -58 53 14.8 L C51
2010-07-18 06:57:09 S 04 30 54.02 -58 53 44.8 L C51
2010-07-18 08:32:30 S 04 31 12.51 -58 54 14.7 L C51
2010-07-18 14:53:32 S 04 32 26.87 -58 56 15.4 L C51
2010-07-18 16:28:42 S 04 32 45.29 -58 56 44.0 L C51
2010-07-18 19:39:13 S 04 33 22.39 -58 57 43.8 L C51
2010-07-18 22:49:44 S 04 33 59.37 -58 58 42.6 L C51
2010-07-19 05:10:46 S 04 35 13.219 -59 00 40.10 L C51
2010-07-19 08:21:17 S 04 35 50.143 -59 01 38.17 L C51
2010-12-31 10:32:34 C 02 06 16.01 -52 47 49.6 u 432
2010-12-31 11:16:53 C 02 06 13.98 -52 45 47.2 u 432
2011-01-01 10:18:53 C 02 05 17.45 -51 42 01.2 u 432
2011-01-01 10:41:52 C 02 05 16.43 -51 40 57.0 u 432
2011-02-08 02:21:12 C 02 06 30.78 -03 48 25.2 r 703
2011-02-08 02:30:59 C 02 06 30.96 -03 47 54.8 r 703
2011-02-08 02:41:00 C 02 06 31.24 -03 47 23.9 r 703
2011-02-08 02:51:00 C 02 06 31.35 -03 46 51.9 r 703
2011-02-08 03:00:52 C 02 06 31.53 -03 46 22.5 r 703
2011-03-01 02:32:16 C 02 19 26.61 +19 16 22.2 r 703
2011-03-01 02:41:07 C 02 19 26.79 +19 16 44.3 r 703
2011-03-01 02:50:02 C 02 19 27.01 +19 17 07.2 r 703
2011-03-01 02:58:56 C 02 19 27.33 +19 17 27.9 r 703
2011-06-11 06:03:08 C 11 46 34.679 +80 38 29.44 t F65
2011-06-11 06:04:24 C 11 46 35.567 +80 38 26.44 t F65
2011-06-11 06:05:32 C 11 46 36.414 +80 38 23.85 t F65
2011-06-11 06:06:34 C 11 46 37.154 +80 38 21.52 t F65
2011-06-11 06:07:28 C 11 46 37.764 +80 38 19.27 t F65
2011-06-11 06:08:20 C 11 46 38.440 +80 38 17.34 t F65
2011-06-23 20:46:06 C 13 28 10.31 +64 56 27.0 c A24
2011-06-23 20:47:11 C 13 28 10.51 +64 56 23.3 c A24
2011-06-23 21:46:41 C 13 28 19.29 +64 52 38.5 c A24
2011-06-23 21:47:46 C 13 28 19.46 +64 52 34.6 c A24
2011-06-24 21:21:20 C 13 31 45.04 +63 23 03.1 c A24
2011-06-24 21:22:25 C 13 31 45.21 +63 22 58.9 c A24
2011-06-24 22:25:45 C 13 31 53.78 +63 18 53.9 c A24
2011-06-24 22:26:49 C 13 31 53.91 +63 18 49.6 c A24
2011-06-25 21:00:34 C 13 34 56.23 +61 51 11.8 c A24
2011-06-25 21:01:39 C 13 34 56.38 +61 51 07.4 c A24
2011-06-25 22:00:34 C 13 35 03.75 +61 47 14.6 c A24
2011-06-25 22:01:39 C 13 35 03.91 +61 47 10.3 c A24
2011-06-26 21:11:34 C 13 37 57.82 +60 15 19.2 c A24
2011-06-26 21:12:38 C 13 37 57.92 +60 15 15.1 c A24
2011-06-26 22:11:59 C 13 38 04.88 +60 11 16.4 c A24
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)