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
2021-11-13 00:13:56 s 1 +21351.535 0 +378457.34 8390.0 C57
2021-11-13 02:03:56 S 10 47 46.190 +17 53 36.82 V C57
2021-11-13 02:03:56 s 1 +17455.477 0 +378893.93 4890.0 C57
2021-11-13 02:23:56 S 10 47 48.552 +17 53 19.36 V C57
2021-11-13 02:23:56 s 1 +16746.461 0 +378960.39 3540.0 C57
2021-11-13 02:33:56 S 10 47 49.421 +17 53 10.86 V C57
2021-11-13 02:33:56 s 1 +16391.886 0 +378992.13 7930.0 C57
2021-11-13 02:43:56 S 10 47 50.086 +17 53 07.76 V C57
2021-11-13 02:43:56 s 1 +16037.267 0 +379022.88 2350.0 C57
2021-11-13 02:53:56 S 10 47 51.614 +17 52 55.38 V C57
2021-11-13 02:53:56 s 1 +15682.605 0 +379052.63 6820.0 C57
2021-11-13 03:03:56 S 10 47 52.560 +17 52 51.46 V C57
2021-11-13 03:03:56 s 1 +15327.901 0 +379081.39 1310.0 C57
2021-11-13 04:43:56 S 10 48 02.604 +17 51 42.48 V C57
2021-11-13 04:43:56 s 1 +11778.765 0 +379314.33 7180.0 C57
2021-11-13 05:13:56 S 10 48 06.007 +17 51 15.55 V C57
2021-11-13 05:13:56 s 1 +10713.367 0 +379364.84 950.0 C57
2021-11-13 05:23:56 S 10 48 06.826 +17 51 16.49 V C57
2021-11-13 05:23:56 s 1 +10358.175 0 +379379.69 5510.0 C57
2021-11-13 05:33:56 S 10 48 08.090 +17 51 04.75 V C57
2021-11-13 05:33:56 s 1 +10002.955 0 +379393.54 40.0 C57
2021-11-13 07:23:56 S 10 48 18.881 +17 49 52.57 V C57
2021-11-13 07:43:56 S 10 48 21.113 +17 49 35.80 V C57
2021-11-13 10:03:56 S 10 48 35.256 +17 48 00.86 V C57
2021-11-13 10:25:36 C 10 48 12.72 +17 47 14.4 V 703
2021-11-13 10:33:51 C 10 48 13.57 +17 47 08.7 V 703
2021-11-13 10:33:56 S 10 48 37.855 +17 47 37.14 V C57
2021-11-13 10:42:06 C 10 48 14.41 +17 47 03.4 V 703
2021-11-13 10:43:56 S 10 48 39.127 +17 47 29.04 V C57
2021-11-13 10:50:21 C 10 48 15.25 +17 46 57.1 V 703
2021-11-13 10:53:56 S 10 48 40.546 +17 47 25.94 V C57
2021-11-13 12:43:56 S 10 48 51.271 +17 46 03.83 V C57
2021-11-13 12:53:56 S 10 48 52.346 +17 46 03.61 V C57
2021-11-13 13:03:56 S 10 48 53.726 +17 45 55.84 V C57
2021-11-13 13:13:56 S 10 48 54.230 +17 45 53.50 V C57
2021-11-13 13:23:56 S 10 48 55.718 +17 45 45.40 V C57
2021-11-13 15:13:56 S 10 49 06.624 +17 44 24.36 V C57
2021-11-13 15:13:56 s 1 -10615.361 0 +378495.73 3680.0 C57
2021-11-13 15:23:56 S 10 49 07.428 +17 44 19.82 V C57
2021-11-13 15:23:56 s 1 -10970.565 0 +378450.87 600.0 C57
2021-11-13 15:33:56 S 10 49 08.594 +17 44 12.70 V C57
2021-11-13 15:33:56 s 1 -11325.740 0 +378405.01 7290.0 C57
2021-11-13 16:13:56 S 10 49 12.283 +17 43 43.68 V C57
2021-11-13 16:13:56 s 1 -12746.139 0 +378211.59 1610.0 C57
2021-11-13 17:33:56 S 10 49 20.705 +17 42 49.46 V C57
2021-11-13 17:33:56 s 1 -15585.280 0 +377776.79 7770.0 C57
2021-11-13 18:03:56 S 10 49 23.789 +17 42 25.38 V C57
2021-11-13 18:03:56 s 1 -16649.310 0 +377597.24 6740.0 C57
2021-11-13 18:33:56 S 10 49 27.199 +17 42 07.16 V C57
2021-11-13 18:33:56 s 1 -17712.946 0 +377408.68 3050.0 C57
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)