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
2022-02-15 22:16:09 C 13 02 55.67 +26 09 18.9 V C40
2022-02-15 22:17:42 C 13 02 55.94 +26 09 19.9 V C40
2022-02-15 23:29:00 C 13 03 08.61 +26 10 00.1 X L76
2022-02-15 23:35:50 C 13 03 09.84 +26 10 04.1 X L76
2022-02-15 23:42:42 C 13 03 11.07 +26 10 08.2 X L76
2022-02-16 03:32:42 C 13 03 59.36 +26 12 09.2 q W64
2022-02-16 03:39:09 C 13 04 00.75 +26 12 13.4 q W64
2022-02-16 04:00:32 C 13 04 04.81 +26 12 27.4 q W64
2022-02-16 04:14:43 C 13 04 07.52 +26 12 37.0 q W64
2022-02-16 06:50:07 V 13 04 37.08 +26 14 21.1 14.9 V 270
2022-02-16 06:50:07 v 1 276.64270 +33.90573 270
2022-02-16 07:02:02 V 13 04 39.22 +26 14 27.8 15.2 V 270
2022-02-16 07:02:02 v 1 276.64270 +33.90573 270
2022-02-16 07:15:56 V 13 04 41.70 +26 14 37.4 15.0 V 270
2022-02-16 07:15:56 v 1 276.64270 +33.90573 270
2022-02-16 07:21:53 V 13 04 42.87 +26 14 40.5 15.1 V 270
2022-02-16 07:21:53 v 1 276.64270 +33.90573 270
2022-02-16 12:09:18 C 13 05 41.55 +26 17 40.9 V T05
2022-02-16 12:11:57 C 13 05 42.03 +26 17 42.5 V T05
2022-02-16 12:15:55 C 13 05 42.75 +26 17 45.0 V T05
2022-02-16 12:23:09 C 13 05 44.09 +26 17 49.6 V T05
2022-02-16 22:30:53 C 13 07 51.87 +26 23 10.0 V B18
2022-02-16 22:35:30 C 13 07 52.80 +26 23 13.1 V B18
2022-02-16 22:40:05 C 13 07 53.70 +26 23 16.0 V B18
2022-02-16 22:44:42 C 13 07 54.63 +26 23 19.0 V B18
2022-02-16 22:49:17 C 13 07 55.52 +26 23 21.8 V B18
2022-02-16 22:53:54 C 13 07 56.44 +26 23 24.8 V B18
2022-02-17 12:25:37 C 13 10 56.36 +26 32 01.9 V T08
2022-02-17 12:48:05 C 13 11 00.95 +26 32 16.6 V T08
2022-02-17 12:56:01 C 13 11 02.58 +26 32 21.6 V T08
2022-02-17 13:00:40 C 13 11 03.53 +26 32 24.5 V T08
2022-02-17 16:01:06 V 13 11 46.52 +26 33 47.1 15.5 V 270
2022-02-17 16:01:06 v 1 140.17432 +36.06242 270
2022-02-17 16:13:37 V 13 11 49.08 +26 33 55.1 15.4 V 270
2022-02-17 16:13:37 v 1 140.17432 +36.06242 270
2022-02-17 16:24:20 V 13 11 51.54 +26 34 02.7 15.5 V 270
2022-02-17 16:24:20 v 1 140.17432 +36.06242 270
2022-02-17 16:38:38 V 13 11 54.46 +26 34 12.2 15.0 V 270
2022-02-17 16:38:38 v 1 140.17432 +36.06242 270
2022-02-17 22:30:16 C 13 13 19.89 +26 37 34.8 V M24
2022-02-17 23:04:03 C 13 13 28.21 +26 37 49.8 X J57
2022-02-17 23:26:02 C 13 13 33.29 +26 38 05.9 X J57
2022-02-17 23:48:02 C 13 13 38.33 +26 38 22.0 X J57
2022-02-18 00:10:03 C 13 13 43.36 +26 38 37.8 X J57
2022-02-18 00:32:03 C 13 13 48.36 +26 38 53.5 X J57
2022-02-18 00:38:04 C 13 13 48.50 +26 39 04.9 V M24
2022-02-18 00:54:02 C 13 13 53.32 +26 39 08.7 X J57
2022-02-18 01:16:02 C 13 13 58.29 +26 39 24.3 X J57
2022-02-18 01:38:02 C 13 14 03.23 +26 39 39.2 X J57
2022-02-18 02:00:04 C 13 14 08.15 +26 39 53.9 X J57
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)