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
2022-02-13 08:58:06 C 12 52 19.70 +25 38 01.6 U I41
2022-02-13 08:59:28 C 12 52 19.89 +25 38 02.3 U I41
2022-02-13 11:07:29 C 12 52 40.50 +25 39 17.0 V T08
2022-02-13 11:15:28 C 12 52 41.62 +25 39 21.3 V T08
2022-02-13 11:20:07 C 12 52 42.27 +25 39 23.8 V T08
2022-02-13 11:32:04 C 12 52 43.94 +25 39 30.6 V T08
2022-02-13 11:42:04 C 12 52 45.33 +25 39 35.9 V T08
2022-02-13 11:51:21 C 12 52 46.62 +25 39 40.9 V T08
2022-02-13 11:56:00 C 12 52 47.27 +25 39 43.3 V T08
2022-02-13 12:12:35 C 12 52 49.56 +25 39 52.2 V T08
2022-02-14 08:09:14 C 12 56 04.21 +25 49 24.6 V 703
2022-02-14 08:16:46 C 12 56 05.36 +25 49 28.8 V 703
2022-02-14 08:24:17 C 12 56 06.51 +25 49 33.2 V 703
2022-02-14 08:31:49 C 12 56 07.66 +25 49 37.4 V 703
2022-02-14 12:16:42 C 12 56 45.09 +25 51 48.9 V T08
2022-02-14 12:24:23 C 12 56 46.26 +25 51 53.1 V T08
2022-02-14 12:29:05 C 12 56 46.97 +25 51 55.7 V T08
2022-02-14 12:43:50 C 12 56 49.19 +25 52 03.7 V T08
2022-02-15 00:39:55 C 12 58 53.17 +25 57 42.9 V 089
2022-02-15 00:43:13 C 12 58 53.71 +25 57 44.6 V 089
2022-02-15 00:46:32 C 12 58 54.25 +25 57 46.2 V 089
2022-02-15 00:49:50 C 12 58 54.80 +25 57 48.0 V 089
2022-02-15 00:53:08 C 12 58 55.32 +25 57 49.6 V 089
2022-02-15 00:56:26 C 12 58 55.87 +25 57 51.7 V 089
2022-02-15 00:59:44 C 12 58 56.39 +25 57 53.3 V 089
2022-02-15 01:03:02 C 12 58 56.94 +25 57 55.1 V 089
2022-02-15 01:06:20 C 12 58 57.46 +25 57 56.7 V 089
2022-02-15 01:09:38 C 12 58 58.00 +25 57 58.5 V 089
2022-02-15 10:54:54 C 13 00 47.71 +26 03 34.2 V T05
2022-02-15 10:58:12 C 13 00 48.27 +26 03 36.2 V T05
2022-02-15 11:06:47 C 13 00 49.72 +26 03 41.6 V T05
2022-02-15 11:17:21 C 13 00 51.49 +26 03 48.2 V T05
2022-02-15 20:30:33 C 13 02 36.40 +26 08 15.8 q B18
2022-02-15 20:31:41 C 13 02 36.60 +26 08 16.2 V B18
2022-02-15 20:35:07 C 13 02 37.24 +26 08 18.7 q B18
2022-02-15 20:36:16 C 13 02 37.45 +26 08 19.1 V B18
2022-02-15 20:40:52 C 13 02 38.28 +26 08 22.1 V B18
2022-02-15 20:45:29 C 13 02 39.12 +26 08 24.9 V B18
2022-02-15 20:50:04 C 13 02 39.96 +26 08 27.8 V B18
2022-02-15 20:54:41 C 13 02 40.81 +26 08 30.8 V B18
2022-02-15 21:32:04 C 13 02 47.69 +26 08 51.7 V C40
2022-02-15 21:38:14 C 13 02 48.81 +26 08 55.5 V C40
2022-02-15 21:49:01 C 13 02 50.77 +26 09 02.2 V C40
2022-02-15 21:50:35 C 13 02 51.05 +26 09 03.2 V C40
2022-02-15 21:53:40 C 13 02 51.61 +26 09 05.2 V C40
2022-02-15 21:56:45 C 13 02 52.17 +26 09 07.0 V C40
2022-02-15 22:01:22 C 13 02 53.01 +26 09 09.9 V C40
2022-02-15 22:09:04 C 13 02 54.39 +26 09 14.5 V C40
2022-02-15 22:09:59 C 13 02 54.56 +26 09 15.1 V C40
2022-02-15 22:13:04 C 13 02 55.11 +26 09 17.0 V C40
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)