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
2021-11-28 08:33:55 s 1 -87934.490 0 +343268.44 8810.0 C57
2021-11-28 10:03:55 S 11 25 45.149 +13 17 08.92 V C57
2021-11-28 10:03:55 s 1 -90807.975 0 +340690.22 3510.0 C57
2021-11-28 10:13:55 S 11 25 46.286 +13 16 58.69 V C57
2021-11-28 10:13:55 s 1 -91125.768 0 +340398.28 8420.0 C57
2021-11-28 10:23:55 S 11 25 47.357 +13 16 52.61 V C57
2021-11-28 10:23:55 s 1 -91443.260 0 +340105.25 1960.0 C57
2021-11-28 10:33:55 S 11 25 48.521 +13 16 42.67 V C57
2021-11-28 10:33:55 s 1 -91760.449 0 +339811.11 4130.0 C57
2021-11-28 10:43:56 S 11 25 49.682 +13 16 36.05 V C57
2021-11-28 10:43:56 s 1 -92077.333 0 +339515.88 4910.0 C57
2021-11-28 11:13:55 S 11 25 52.375 +13 16 05.56 V C57
2021-11-28 11:13:55 s 1 -93026.140 0 +338623.59 8930.0 C57
2021-11-28 12:33:56 S 11 26 00.749 +13 15 04.28 V C57
2021-11-28 12:33:56 s 1 -95542.504 0 +336195.65 760.0 C57
2021-11-28 12:53:55 S 11 26 02.844 +13 14 48.48 V C57
2021-11-28 12:53:55 s 1 -96168.394 0 +335577.60 6810.0 C57
2021-11-28 13:03:55 S 11 26 03.775 +13 14 37.57 V C57
2021-11-28 13:03:55 s 1 -96480.851 0 +335266.91 7630.0 C57
2021-11-28 13:13:55 S 11 26 04.985 +13 14 31.13 V C57
2021-11-28 13:13:55 s 1 -96792.979 0 +334955.12 6990.0 C57
2021-11-28 13:23:55 S 11 26 05.978 +13 14 26.77 V C57
2021-11-28 13:23:55 s 1 -97104.779 0 +334642.21 4860.0 C57
2021-11-28 13:33:55 S 11 26 06.919 +13 14 14.06 V C57
2021-11-28 13:33:55 s 1 -97416.247 0 +334328.19 1250.0 C57
2021-11-28 13:43:56 S 11 26 07.867 +13 14 06.54 V C57
2021-11-28 13:43:56 s 1 -97727.383 0 +334013.06 6140.0 C57
2021-11-28 15:03:55 S 11 26 15.888 +13 13 00.80 V C57
2021-11-28 15:03:55 s 1 -100204.30 5 +331451.85 810.0 C57
2021-11-28 15:23:55 S 11 26 18.238 +13 12 48.10 V C57
2021-11-28 15:23:55 s 1 -100820.09 7 +330800.37 1600.0 C57
2021-11-28 15:33:55 S 11 26 19.334 +13 12 34.20 V C57
2021-11-28 15:33:55 s 1 -101127.46 9 +330472.94 9650.0 C57
2021-11-28 15:43:55 S 11 26 20.340 +13 12 27.32 V C57
2021-11-28 15:43:55 s 1 -101434.48 8 +330144.40 6130.0 C57
2021-11-28 15:53:55 S 11 26 21.254 +13 12 17.93 V C57
2021-11-28 15:53:55 s 1 -101741.15 4 +329814.72 1030.0 C57
2021-11-28 16:03:55 S 11 26 22.188 +13 12 13.18 V C57
2021-11-28 16:03:55 s 1 -102047.46 4 +329483.93 4340.0 C57
2021-11-28 16:13:55 S 11 26 23.237 +13 12 02.12 V C57
2021-11-28 16:13:55 s 1 -102353.41 7 +329152.01 6070.0 C57
2021-11-28 17:53:55 S 11 26 33.578 +13 10 43.86 V C57
2021-11-28 17:53:55 s 1 -105392.94 3 +325770.71 4260.0 C57
2021-11-28 18:03:55 S 11 26 34.718 +13 10 32.52 V C57
2021-11-28 18:03:55 s 1 -105694.85 7 +325426.35 8030.0 C57
2021-11-28 18:13:56 S 11 26 35.498 +13 10 23.20 V C57
2021-11-28 18:13:56 s 1 -105996.39 4 +325080.85 110.0 C57
2021-11-28 18:23:55 S 11 26 36.622 +13 10 18.26 V C57
2021-11-28 18:23:55 s 1 -106297.55 1 +324734.22 520.0 C57
2021-11-28 18:33:55 S 11 26 37.694 +13 10 07.18 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)