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
2022-02-22 03:27:39 C 13 45 14.55 +27 46 32.7 X M03
2022-02-22 03:57:43 C 13 45 26.38 +27 46 54.0 X M03
2022-02-22 14:45:31 C 13 50 09.12 +27 55 22.7 V T08
2022-02-22 14:59:17 C 13 50 14.88 +27 55 31.9 V T08
2022-02-22 15:50:36 C 13 50 36.50 +27 56 04.6 V T08
2022-02-22 15:55:40 V 13 50 46.89 +27 55 31.6 14.7 V 270
2022-02-22 15:55:40 v 1 140.17440 +36.06241 270
2022-02-22 15:59:29 C 13 50 40.27 +27 56 10.0 V T08
2022-02-22 16:07:43 V 13 50 52.07 +27 55 41.6 14.8 V 270
2022-02-22 16:07:43 v 1 140.17440 +36.06241 270
2022-02-22 16:20:41 V 13 50 57.71 +27 55 52.2 14.7 V 270
2022-02-22 16:20:41 v 1 140.17440 +36.06241 270
2022-02-22 16:33:40 V 13 51 03.31 +27 56 02.4 14.6 V 270
2022-02-22 16:33:40 v 1 140.17440 +36.06241 270
2022-02-22 20:41:07 V 13 52 59.59 +27 57 54.3 14.6 V 270
2022-02-22 20:41:07 v 1 024.63056 +60.79160 270
2022-02-22 20:54:37 V 13 53 05.87 +27 58 05.0 14.7 V 270
2022-02-22 20:54:37 v 1 024.63056 +60.79160 270
2022-02-22 21:06:59 V 13 53 11.62 +27 58 15.2 14.7 V 270
2022-02-22 21:06:59 v 1 024.63056 +60.79160 270
2022-02-22 21:19:22 V 13 53 17.43 +27 58 25.1 15.0 V 270
2022-02-22 21:19:22 v 1 024.63056 +60.79160 270
2022-02-23 00:20:05 V 13 54 44.69 +28 00 55.6 14.7 V 270
2022-02-23 00:20:05 v 1 359.62637 +49.20374 270
2022-02-23 00:26:50 V 13 54 48.65 +28 01 06.9 15.2 V 270
2022-02-23 00:26:50 v 1 359.62637 +49.20374 270
2022-02-23 00:35:50 V 13 54 52.12 +28 01 09.4 14.6 V 270
2022-02-23 00:35:50 v 1 359.62637 +49.20374 270
2022-02-23 00:50:27 V 13 54 59.38 +28 01 11.9 13.5 V 270
2022-02-23 00:50:27 v 1 359.62637 +49.20374 270
2022-02-23 02:23:34 C 13 55 41.79 +28 02 30.6 V C23
2022-02-23 02:26:51 C 13 55 43.32 +28 02 33.0 V C23
2022-02-23 02:29:43 C 13 55 44.66 +28 02 35.1 V C23
2022-02-23 02:33:25 C 13 55 46.40 +28 02 38.0 V C23
2022-02-23 12:17:17 C 14 00 46.87 +28 10 17.2 V T05
2022-02-23 12:19:56 C 14 00 48.17 +28 10 19.2 V T05
2022-02-23 12:23:53 C 14 00 50.12 +28 10 22.4 V T05
2022-02-23 12:31:07 C 14 00 53.69 +28 10 28.1 V T05
2022-02-23 19:24:36 C 14 04 40.70 +28 13 32.3 V C40
2022-02-23 19:30:01 C 14 04 43.70 +28 13 36.7 V C40
2022-02-23 19:32:39 C 14 04 45.16 +28 13 38.9 V C40
2022-02-23 19:36:09 C 14 04 47.11 +28 13 41.7 V C40
2022-02-23 19:51:44 C 14 04 55.70 +28 13 54.5 V C40
2022-02-24 13:57:47 V 14 15 45.64 +28 25 11.9 14.3 V 270
2022-02-24 13:57:47 v 1 130.69568 +31.75611 270
2022-02-24 14:10:45 V 14 15 53.73 +28 25 22.4 14.4 V 270
2022-02-24 14:10:45 v 1 130.69568 +31.75611 270
2022-02-24 14:24:51 V 14 16 02.59 +28 25 33.7 14.5 V 270
2022-02-24 14:24:51 v 1 130.69568 +31.75611 270
2022-02-24 14:36:53 V 14 16 10.24 +28 25 44.0 14.5 V 270
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)