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
2023-07-07 07:15:12 S 22 24 49.025 -76 10 48.83 V C57
2023-07-07 07:15:12 s 1 +183100.22 6 +285223.80 7200.0 C57
2023-07-07 07:35:12 S 22 24 48.202 -76 11 40.06 V C57
2023-07-07 07:35:12 s 1 +182584.04 6 +285843.83 2590.0 C57
2023-07-07 07:55:12 S 22 24 45.768 -76 12 29.88 V C57
2023-07-07 07:55:12 s 1 +182065.35 1 +286460.00 6300.0 C57
2023-07-07 08:15:12 S 22 24 44.750 -76 13 21.04 V C57
2023-07-07 08:15:12 s 1 +181544.15 8 +287072.31 8460.0 C57
2023-07-07 08:35:12 S 22 24 43.142 -76 14 07.76 V C57
2023-07-07 08:35:12 s 1 +181020.48 7 +287680.77 9210.0 C57
2023-07-07 08:55:12 S 22 24 41.830 -76 15 00.29 V C57
2023-07-07 08:55:12 s 1 +180494.32 7 +288285.36 8540.0 C57
2023-07-07 09:15:12 S 22 24 39.722 -76 15 58.00 V C57
2023-07-07 09:15:12 s 1 +179965.69 6 +288886.07 6580.0 C57
2023-07-07 10:15:12 S 22 24 35.513 -76 18 26.42 V C57
2023-07-07 10:15:12 s 1 +178365.08 5 +290664.94 3850.0 C57
2023-07-07 10:35:12 S 22 24 33.746 -76 19 14.12 V C57
2023-07-07 10:35:12 s 1 +177826.67 3 +291250.13 7620.0 C57
2023-07-07 10:55:12 S 22 24 32.868 -76 20 05.50 V C57
2023-07-07 10:55:12 s 1 +177285.82 7 +291831.40 480.0 C57
2023-07-07 11:15:12 S 22 24 30.629 -76 20 55.43 V C57
2023-07-07 11:15:12 s 1 +176742.56 4 +292408.78 2560.0 C57
2023-07-07 11:35:12 S 22 24 29.258 -76 21 44.68 V C57
2023-07-07 11:35:12 s 1 +176196.90 3 +292982.26 3990.0 C57
2023-07-08 11:25:12 S 22 22 33.977 -77 20 51.47 V C57
2023-07-08 11:25:12 s 1 +131487.85 8 +323520.48 2790.0 C57
2023-07-08 11:45:12 S 22 22 32.206 -77 21 43.02 V C57
2023-07-08 11:45:12 s 1 +130790.42 1 +323796.27 7250.0 C57
2023-07-08 14:45:12 S 22 22 16.918 -77 29 07.33 V C57
2023-07-08 14:45:12 s 1 +124434.19 7 +326083.41 6130.0 C57
2023-07-08 15:25:12 S 22 22 12.962 -77 30 36.86 V C57
2023-07-08 15:25:12 s 1 +123002.68 9 +326543.71 4770.0 C57
2023-07-08 16:45:12 S 22 22 04.896 -77 33 55.01 V C57
2023-07-08 16:45:12 s 1 +120119.42 8 +327411.59 7310.0 C57
2023-07-08 17:05:12 S 22 22 03.902 -77 34 46.38 V C57
2023-07-08 17:05:12 s 1 +119394.45 1 +327617.56 6620.0 C57
2023-07-08 18:05:12 S 22 21 58.164 -77 37 11.82 V C57
2023-07-08 18:05:12 s 1 +117209.64 4 +328208.88 4670.0 C57
2023-07-08 18:45:12 S 22 21 55.169 -77 38 43.69 V C57
2023-07-08 18:45:12 s 1 +115744.96 7 +328580.90 4320.0 C57
2023-07-08 19:45:12 S 22 21 48.734 -77 41 06.58 V C57
2023-07-08 19:45:12 s 1 +113535.92 7 +329105.52 6940.0 C57
2023-07-08 20:05:12 S 22 21 47.453 -77 41 57.55 V C57
2023-07-08 20:05:12 s 1 +112796.41 1 +329271.47 8990.0 C57
2023-07-08 20:25:12 S 22 21 45.226 -77 42 48.42 V C57
2023-07-08 20:25:12 s 1 +112055.31 7 +329432.92 8430.0 C57
2023-07-08 20:45:12 S 22 21 44.263 -77 43 30.61 V C57
2023-07-08 20:45:12 s 1 +111312.65 9 +329589.89 5350.0 C57
2023-07-08 21:05:12 S 22 21 42.660 -77 44 25.66 V C57
2023-07-08 21:05:12 s 1 +110568.45 1 +329742.37 9850.0 C57
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)