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
1958-10-04 05:32:40 A 02 32 26.03 +43 31 11.4 689
1958-10-13 12:11:30 A 02 02 47.04 +44 20 27.5 675
1958-10-15 04:42:01 A 01 57 12.40 +44 19 05.3 15.9 760
1958-10-15 06:26:59 A 01 56 57.75 +44 18 55.9 760
1958-10-20 09:35:59 A 01 40.2 +43 56 15.8 760
1958-11-04 07:47:44 A 00 59 48.35 +40 38 39.0 689
1958-11-04 07:59:41 A 00 59 47.27 +40 38 30.1 689
1958-11-06 03:16:52 A 00 56 16.36 +40 06 53.9 760
1958-11-06 04:18:56 A 00 56 11.14 +40 06 08.2 760
1961-11-29 05:19:30 A 07 05 39.59 +50 42 57.3 689
1961-11-29 05:55:30 A 07 05 36.92 +50 43 16.7 689
1961-12-29 05:39:47 A 05 36 48.70 +52 27 57.0 689
1961-12-29 06:17:47 A 05 36 43.04 +52 27 42.4 689
1965-01-26 10:02:02 A 13 19 35.99 -02 29 23.3 675
1965-01-26 10:14:52 A 13 19 37.79 -02 29 46.1 675
1965-01-26 11:32:00 A 13 19 47.25 -02 31 51.7 675
1965-01-26 11:44:02 A 13 19 48.76 -02 32 10.9 675
1965-01-26 11:45:37 A 13 19 49.25 -02 32 19.3 689
1965-01-26 11:58:37 A 13 19 50.93 -02 32 41.3 689
1965-02-25 11:14:31 A 15 50 16.88 -33 19 37.0 689
1965-02-25 11:29:30 A 15 50 21.95 -33 20 24.1 689
1965-08-07 10:52:58 A 03 27 48.49 +26 41 48.8 689
1965-08-25 09:19:15 A 03 56 16.72 +32 36 40.9 689
1965-08-25 10:55:24 A 03 56 22.00 +32 37 57.8 689
1965-09-25 09:59:37 A 04 19 00.39 +42 21 54.3 689
1965-09-25 11:29:37 A 04 18 59.76 +42 22 59.5 689
1968-12-23 12:13:54 A 08 10 31.96 +48 15 16.9 693
1968-12-23 12:46:54 A 08 10 28.79 +48 15 30.8 693
1968-12-31 09:07:46 A 07 49 29.95 +49 26 08.6 689
1968-12-31 09:27:45 A 07 49 27.30 +49 26 13.9 689
1969-01-07 07:27:40 A 07 26 25.02 +49 51 58.2 689
1969-01-07 07:52:34 A 07 26 21.21 +49 51 58.7 689
1969-01-08 02:16:54 A 07 23 38.75 +49 51 59.7 693
1969-01-08 02:30:54 A 07 23 36.69 +49 52 00.3 693
1969-01-11 07:47:45 A 07 11 55.84 +49 45 56.3 689
1969-01-11 07:57:42 A 07 11 54.26 +49 45 54.5 689
1969-01-11 08:35:00 A 07 11 48.45 +49 45 48.5 689
1969-01-11 08:50:00 A 07 11 46.16 +49 45 45.9 689
1969-01-23 14:11:54 A 06 29 26.89 +47 43 59.5 17.0 370
1969-01-23 14:40:59 A 06 29 23.79 +47 43 48.9 370
1969-01-26 02:02:15 A 06 22 05.14 +47 02 19.3 17.5 026
1969-01-26 03:00:00 A 06 21 58.47 +47 01 33.4 026
1969-07-18 23:02:41 A 09 50 45.30 -20 45 37.3 805
1969-07-18 23:08:40 A 09 50 45.65 -20 45 45.5 805
1969-07-18 23:14:40 A 09 50 45.99 -20 45 53.5 805
1969-08-14 23:22:59 A 11 17 05.70 -42 31 54.5 805
1969-08-14 23:25:58 A 11 17 06.89 -42 32 05.4 805
1969-08-14 23:28:58 A 11 17 08.06 -42 32 17.7 805
1969-08-16 23:37:31 A 11 39 42.70 -45 46 03.6 807
1969-08-16 23:50:01 A 11 39 49.58 -45 46 53.8 807
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)