1620 Geographos (1951 RA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3355121545 ± 2.00e+00
Semi-major axis (a)1.2457769668 AU ± 3.00e+00
Inclination (i)13.33577542° ± 4.00e+00
Long. of Asc. Node (Ω)337.14082621° ± 5.00e+00
Arg. of Perihelion (ω)277.01835526° ± 6.00e+00
Mean Anomaly (M)212.92032873° ± 2.36e-05
Mean Motion (n)0.7088458984°/day ± 2.56e+00
Perihelion dist (q)0.82780365 AU ± 3.19e+00
Aphelion dist (Q)1.66375028 AU ± 4.72e+00
Orbital Period1.39046623 yr ± 5.02e+00
NGA Modelr2
A23.55475120e-06 AU/d²
Physical Parameters
H (abs. magnitude)15.26
G (slope)0.15
Alternative Designations

1983 CY3

Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.276″
Uncertainty0
Orbit TypeApollo
MOID0.028806 AU
Observations Used9056
Radar Obs Used5
Gaia Obs Used104
Oppositions19
Arc Total1951-2017
First Observation Used1951-08-31
Last Observation Used2026-04-08
Observations (11927)
Date Type RA Dec Mag Band Observatory
1954-10-26 09:31:45 A 06 09 19.96 +47 38 35.6 711
1954-10-26 09:48:11 A 06 09 19.78 +47 38 45.5 711
1954-11-06 11:59:29 A 06 02 00.45 +50 15 54.8 675
1954-11-06 12:09:30 A 06 02 00.06 +50 16 00.8 675
1954-11-29 06:08:15 A 05 09 21.79 +53 46 35.7 662
1954-11-29 06:41:10 A 05 09 17.05 +53 46 38.9 662
1954-11-30 07:42:06 A 05 05 50.45 +53 47 58.8 754
1954-11-30 07:54:07 A 05 05 48.78 +53 47 58.9 754
1954-12-02 08:21:00 A 04 59 03.33 +53 47 40.6 754
1954-12-02 08:33:44 A 04 59 01.66 +53 47 40.3 754
1954-12-24 03:11:48 A 03 53 30.91 +50 00 37.4 754
1954-12-24 03:24:46 A 03 53 29.64 +50 00 27.4 754
1955-10-11 01:59:35 A 17 40 55.10 -25 30 15.5 711
1955-10-11 02:09:05 A 17 40 57.34 -25 30 11.1 711
1955-10-14 02:57:59 A 17 58 51.05 -24 43 25.4 675
1955-10-21 01:54:42 A 18 37 45.15 -22 32 57.5 711
1955-10-21 02:01:42 A 18 37 46.66 -22 32 51.2 711
1955-11-05 03:12:29 A 19 50 45.11 -16 49 04.7 662
1955-11-05 03:49:30 A 19 50 51.76 -16 48 26.2 662
1955-11-10 02:15:50 A 20 11 41.14 -14 49 25.9 711
1955-11-10 02:25:24 A 20 11 42.43 -14 49 16.9 711
1955-11-11 01:45:14 A 20 15 39.16 -14 25 51.7 711
1955-11-11 01:53:43 A 20 15 40.61 -14 25 43.9 711
1955-11-11 02:55:06 A 20 15 51.01 -14 24 41.6 662
1955-11-11 03:31:06 A 20 15 56.99 -14 24 05.1 662
1955-11-13 01:37:24 A 20 23 35.36 -13 37 54.5 711
1955-11-13 01:44:55 A 20 23 36.59 -13 37 46.6 711
1958-01-16 06:35:29 A 11 03 46.36 +26 33 14.9 711
1958-01-21 06:09:39 A 11 02 49.10 +26 31 05.8 711
1958-01-21 07:16:09 A 11 02 47.71 +26 31 06.5 711
1958-02-12 07:24:37 A 10 26 29.99 +25 17 18.4 689
1958-02-12 07:34:06 A 10 26 28.62 +25 17 14.9 689
1958-02-16 07:38:05 A 10 12 00.77 +24 26 20.0 689
1958-02-16 07:47:03 A 10 11 59.19 +24 26 14.2 689
1958-03-12 03:23:56 A 07 55 45.14 +07 30 59.1 754
1958-03-12 03:29:57 A 07 55 43.23 +07 30 39.1 754
1958-08-12 10:13:00 A 03 12 11.41 +23 51 19.8 711
1958-08-12 10:21:00 A 03 12 11.68 +23 51 28.6 711
1958-08-13 09:57:24 A 03 12 59.53 +24 17 59.4 711
1958-08-13 10:04:19 A 03 12 59.72 +24 18 07.3 711
1958-08-15 08:32:28 A 03 14 28.39 +25 10 10.7 711
1958-08-15 08:41:28 A 03 14 28.65 +25 10 20.4 711
1958-08-17 09:01:09 A 03 15 51.91 +26 03 47.6 711
1958-08-18 09:33:24 A 03 16 30.62 +26 30 52.1 711
1958-08-18 09:44:35 A 03 16 30.89 +26 31 04.7 711
1958-09-14 10:16:28 A 03 13 02.97 +37 45 04.0 689
1958-09-14 10:30:25 A 03 13 02.23 +37 45 17.7 689
1958-09-22 10:36:54 A 03 01 04.95 +40 33 26.1 689
1958-09-22 10:52:22 A 03 01 03.67 +40 33 38.2 689
1958-10-04 05:19:13 A 02 32 27.66 +43 31 05.1 689
Radar Observations (12)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1983-02-27 05:00:00 161795 5 Hz 2380 -1 -1
1983-02-27.208333 16179500 500 Hz 2380 251 251
1983-02-28 05:04:00 142007628 30 us 2380 -1 -1
1983-02-28.211111 14200762800 30000 us 2380 251 251
1994-08-28 07:10:00 38936537.06 1.76 us 8510 -14 -14
1994-08-28 07:10:00 -364880.593 0.9 Hz 8510 -14 -14
1994-08-28.298611 3893653706 1760 us 8510 253 253
1994-08-29 04:40:00 42596456.4 1.13 us 8510 -14 -14
1994-08-29 04:40:00 -427851.027 0.2 Hz 8510 -14 -14
1994-08-29.194444 4259645640 1130 us 8510 253 253
1994-09-02 07:20:00 -615553.2 0.5 Hz 8510 -14 -14
1994-09-02.305556 -61555320 50 Hz 8510 253 253
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)