IAA RAS IAA Minor Planet Database

138971 (2001 CB21)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3333956066 ± 2.78e-09
Semi-major axis (a)1.0335726681 AU ± 1.43e-10
Inclination (i)7.91834368° ± 6.35e-07
Long. of Asc. Node (Ω)353.64713274° ± 2.04e-06
Arg. of Perihelion (ω)271.93550869° ± 1.82e-06
Mean Anomaly (M)131.04916712° ± 8.25e-07
Mean Motion (n)0.9379954932°/day ± 1.95e-10
Perihelion dist (q)0.68898408 AU ± 2.87e-09
Aphelion dist (Q)1.37816125 AU ± 2.87e-09
Orbital Period1.05077934 yr ± 2.19e-10
Physical Parameters
H (abs. magnitude)18.54
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.368″
Uncertainty0
Orbit TypeApollo
MOID0.023880 AU
Observations Used2563
Radar Obs Used2
Oppositions1
Arc Total2001-2026
First Observation Used2001-02-02
Last Observation Used2026-01-13
Observations (3014)
Date Type RA Dec Mag Band Observatory
2023-12-31 10:21:44 S 06 32 04.932 +49 43 43.25 – V C57
2023-12-31 10:21:44 s 1 -21184.536 0 +223352.81 7930.0 – C57
2023-12-31 11:01:44 S 06 31 55.920 +49 43 34.39 – V C57
2023-12-31 11:01:44 s 1 -23076.956 0 +221259.96 0.882 – C57
2023-12-31 11:21:44 S 06 31 52.109 +49 43 31.30 – V C57
2023-12-31 11:21:44 s 1 -24021.877 0 +220200.48 0.046 – C57
2023-12-31 11:41:44 S 06 31 47.942 +49 43 29.32 – V C57
2023-12-31 11:41:44 s 1 -24965.871 0 +219132.19 0.185 – C57
2023-12-31 12:01:44 S 06 31 42.763 +49 43 25.28 – V C57
2023-12-31 12:01:44 s 1 -25908.890 0 +218055.04 0.237 – C57
2023-12-31 12:21:44 S 06 31 39.022 +49 43 16.43 – V C57
2023-12-31 12:21:44 s 1 -26850.903 0 +216969.14 0.211 – C57
2023-12-31 12:41:44 S 06 31 34.582 +49 43 23.84 – V C57
2023-12-31 12:41:44 s 1 -27791.851 0 +215874.35 0.995 – C57
2023-12-31 13:01:44 S 06 31 30.806 +49 43 18.66 – V C57
2023-12-31 13:01:44 s 1 -28731.682 0 +214770.62 0.525 – C57
2023-12-31 13:21:44 S 06 31 25.526 +49 43 13.08 – V C57
2023-12-31 13:21:44 s 1 -29670.366 0 +213658.05 0.81 – C57
2023-12-31 14:01:44 S 06 31 17.846 +49 43 05.59 – V C57
2023-12-31 14:01:44 s 1 -31544.047 0 +211405.96 0.232 – C57
2023-12-31 14:21:44 S 06 31 12.943 +49 43 02.82 – V C57
2023-12-31 14:21:44 s 1 -32478.961 0 +210266.50 0.313 – C57
2023-12-31 15:01:44 S 06 31 04.975 +49 43 06.06 – V C57
2023-12-31 15:01:44 s 1 -34344.641 0 +207960.36 0.795 – C57
2023-12-31 16:01:44 S 06 30 50.798 +49 42 50.11 – V C57
2023-12-31 16:01:44 s 1 -37132.057 0 +204433.10 0.591 – C57
2023-12-31 16:21:44 S 06 30 47.150 +49 42 43.34 – V C57
2023-12-31 16:21:44 s 1 -38058.023 0 +203239.13 0.643 – C57
2023-12-31 16:41:44 S 06 30 42.550 +49 42 42.23 – V C57
2023-12-31 16:41:44 s 1 -38982.299 0 +202035.95 0.786 – C57
2023-12-31 17:01:44 S 06 30 38.179 +49 42 31.28 – V C57
2023-12-31 17:01:44 s 1 -39904.824 0 +200823.51 0.943 – C57
2023-12-31 17:21:44 S 06 30 34.303 +49 42 33.37 – V C57
2023-12-31 17:21:44 s 1 -40825.570 0 +199601.94 0.131 – C57
2023-12-31 17:41:44 S 06 30 29.926 +49 42 33.05 – V C57
2023-12-31 17:41:44 s 1 -41744.451 0 +198371.09 0.214 – C57
2023-12-31 18:01:44 S 06 30 25.970 +49 42 27.83 – V C57
2023-12-31 18:01:44 s 1 -42661.405 0 +197130.90 0.114 – C57
2023-12-31 18:21:44 S 06 30 21.442 +49 42 34.74 – V C57
2023-12-31 18:21:44 s 1 -43576.401 0 +195881.52 0.845 – C57
2023-12-31 18:41:44 S 06 30 17.419 +49 42 22.28 – V C57
2023-12-31 18:41:44 s 1 -44489.351 0 +194622.78 0.269 – C57
2023-12-31 19:21:44 S 06 30 07.862 +49 42 13.18 – V C57
2023-12-31 19:21:44 s 1 -46308.881 0 +192077.23 0.965 – C57
2023-12-31 19:41:44 S 06 30 04.505 +49 42 12.13 – V C57
2023-12-31 19:41:44 s 1 -47215.339 0 +190790.39 0.109 – C57
2023-12-31 20:21:44 S 06 29 55.090 +49 42 00.43 – V C57
2023-12-31 20:21:44 s 1 -49021.301 0 +188188.45 0.606 – C57
2023-12-31 21:01:44 S 06 29 46.877 +49 41 59.75 – V C57
2023-12-31 21:01:44 s 1 -50817.543 0 +185548.67 0.225 – C57
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2006-10-02 20:11:00 -9701.3065 0.5 Hz 2380 -1 -1
2006-10-02 21:29:00 47834014.65 1.5 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)