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
2021-11-11 16:43:56 s 1 +86107.872 0 +351974.67 2010.0 C57
2021-11-11 17:03:56 S 10 44 22.975 +18 15 59.76 V C57
2021-11-11 17:03:56 s 1 +85457.227 0 +352446.09 1500.0 C57
2021-11-11 18:43:56 S 10 44 34.058 +18 14 53.52 V C57
2021-11-11 18:43:56 s 1 +82188.851 0 +354740.49 140.0 C57
2021-11-11 19:33:56 S 10 44 38.947 +18 14 28.75 V C57
2021-11-11 19:33:56 s 1 +80545.460 0 +355848.59 4910.0 C57
2021-11-11 21:23:56 S 10 44 50.290 +18 13 05.63 V C57
2021-11-11 21:23:56 s 1 +76909.341 0 +358195.03 7530.0 C57
2021-11-11 21:33:56 S 10 44 51.314 +18 12 59.94 V C57
2021-11-11 21:33:56 s 1 +76577.417 0 +358402.13 6150.0 C57
2021-11-11 22:13:56 S 10 44 55.291 +18 12 40.46 V C57
2021-11-11 22:13:56 s 1 +75247.507 0 +359220.19 3640.0 C57
2021-11-12 00:03:56 S 10 45 06.934 +18 11 18.78 V C57
2021-11-12 00:03:56 s 1 +71572.497 0 +361384.79 3350.0 C57
2021-11-12 00:13:56 S 10 45 07.440 +18 11 16.73 V C57
2021-11-12 00:13:56 s 1 +71237.150 0 +361575.40 1220.0 C57
2021-11-12 00:23:56 S 10 45 08.791 +18 11 09.28 V C57
2021-11-12 00:23:56 s 1 +70901.600 0 +361764.98 8440.0 C57
2021-11-12 00:43:56 S 10 45 10.639 +18 10 49.08 V C57
2021-11-12 00:43:56 s 1 +70229.892 0 +362141.06 1010.0 C57
2021-11-12 02:53:56 S 10 45 24.300 +18 09 25.52 V C57
2021-11-12 02:53:56 s 1 +65844.636 0 +364485.74 3360.0 C57
2021-11-12 03:03:56 S 10 45 25.339 +18 09 17.53 V C57
2021-11-12 03:03:56 s 1 +65505.975 0 +364658.94 980.0 C57
2021-11-12 03:13:56 S 10 45 26.194 +18 09 12.42 V C57
2021-11-12 03:13:56 s 1 +65167.129 0 +364831.12 8030.0 C57
2021-11-12 05:03:56 S 10 45 37.318 +18 07 55.31 V C57
2021-11-12 05:03:56 s 1 +61427.939 0 +366657.88 9400.0 C57
2021-11-12 05:13:56 S 10 45 38.582 +18 07 47.96 V C57
2021-11-12 05:13:56 s 1 +61086.960 0 +366817.85 9970.0 C57
2021-11-12 05:23:56 S 10 45 39.679 +18 07 41.66 V C57
2021-11-12 05:23:56 s 1 +60745.810 0 +366976.79 40.0 C57
2021-11-12 05:33:56 S 10 45 40.282 +18 07 38.86 V C57
2021-11-12 05:33:56 s 1 +60404.491 0 +367134.73 9590.0 C57
2021-11-12 05:53:56 S 10 45 42.432 +18 07 26.36 V C57
2021-11-12 05:53:56 s 1 +59721.349 0 +367447.54 7190.0 C57
2021-11-12 06:23:56 S 10 45 45.722 +18 07 02.82 V C57
2021-11-12 06:23:56 s 1 +58695.390 0 +367909.16 9860.0 C57
2021-11-12 07:53:56 S 10 45 54.977 +18 05 59.03 V C57
2021-11-12 07:53:56 s 1 +55608.815 0 +369239.30 2080.0 C57
2021-11-12 08:33:56 S 10 45 59.254 +18 05 34.87 V C57
2021-11-12 08:33:56 s 1 +54232.963 0 +369804.18 8970.0 C57
2021-11-12 08:43:56 S 10 46 00.146 +18 05 28.54 V C57
2021-11-12 08:43:56 s 1 +53888.623 0 +369942.87 9590.0 C57
2021-11-12 08:53:56 S 10 46 01.284 +18 05 17.05 V C57
2021-11-12 08:53:56 s 1 +53544.136 0 +370080.55 9790.0 C57
2021-11-12 09:03:56 S 10 46 01.702 +18 05 16.19 V C57
2021-11-12 09:03:56 s 1 +53199.501 0 +370217.23 9560.0 C57
2021-11-12 10:33:56 S 10 46 11.482 +18 04 12.68 V 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)