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
2021-11-27 03:03:56 s 1 -27875.038 0 +376593.78 8110.0 C57
2021-11-27 03:13:56 S 11 22 35.146 +13 42 20.92 V C57
2021-11-27 03:13:56 s 1 -28227.007 0 +376495.81 8650.0 C57
2021-11-27 03:23:56 S 11 22 36.312 +13 42 12.74 V C57
2021-11-27 03:23:56 s 1 -28578.894 0 +376396.84 8700.0 C57
2021-11-27 03:33:56 S 11 22 37.042 +13 42 02.84 V C57
2021-11-27 03:33:56 s 1 -28930.698 0 +376296.86 8280.0 C57
2021-11-27 03:43:56 S 11 22 38.429 +13 42 00.43 V C57
2021-11-27 03:43:56 s 1 -29282.418 0 +376195.88 7360.0 C57
2021-11-27 05:33:55 S 11 22 49.663 +13 40 22.12 V C57
2021-11-27 05:33:55 s 1 -33145.529 0 +375018.59 3800.0 C57
2021-11-27 05:43:56 S 11 22 50.556 +13 40 19.67 V C57
2021-11-27 05:43:56 s 1 -33496.167 0 +374905.52 6690.0 C57
2021-11-27 05:53:55 S 11 22 51.960 +13 40 11.78 V C57
2021-11-27 05:53:55 s 1 -33846.707 0 +374791.43 9040.0 C57
2021-11-27 06:03:56 S 11 22 53.045 +13 39 59.51 V C57
2021-11-27 06:03:56 s 1 -34197.150 0 +374676.34 850.0 C57
2021-11-27 06:13:56 S 11 22 53.724 +13 39 51.55 V C57
2021-11-27 06:13:56 s 1 -34547.494 0 +374560.23 2110.0 C57
2021-11-27 06:23:56 S 11 22 54.998 +13 39 45.72 V C57
2021-11-27 06:23:56 s 1 -34897.739 0 +374443.12 2810.0 C57
2021-11-27 06:33:56 S 11 22 55.798 +13 39 37.33 V C57
2021-11-27 06:33:56 s 1 -35247.882 0 +374325.00 2960.0 C57
2021-11-27 07:53:56 S 11 23 04.099 +13 38 35.95 V C57
2021-11-27 07:53:56 s 1 -38045.278 0 +373343.59 3570.0 C57
2021-11-27 08:13:56 S 11 23 06.233 +13 38 16.84 V C57
2021-11-27 08:13:56 s 1 -38743.547 0 +373088.11 2860.0 C57
2021-11-27 08:23:56 S 11 23 07.488 +13 38 06.00 V C57
2021-11-27 08:23:56 s 1 -39092.514 0 +372958.85 6600.0 C57
2021-11-27 08:33:55 S 11 23 07.999 +13 37 59.56 V C57
2021-11-27 08:33:55 s 1 -39441.368 0 +372828.57 9740.0 C57
2021-11-27 08:43:56 S 11 23 09.161 +13 37 52.75 V C57
2021-11-27 08:43:56 s 1 -39790.107 0 +372697.28 2260.0 C57
2021-11-27 08:53:55 S 11 23 10.296 +13 37 43.14 V C57
2021-11-27 08:53:55 s 1 -40138.732 0 +372564.98 4170.0 C57
2021-11-27 09:03:56 S 11 23 11.381 +13 37 32.95 V C57
2021-11-27 09:03:56 s 1 -40487.240 0 +372431.66 5470.0 C57
2021-11-27 10:43:56 S 11 23 21.497 +13 36 14.11 V C57
2021-11-27 10:43:56 s 1 -43965.702 0 +371042.56 3420.0 C57
2021-11-27 10:53:56 S 11 23 22.608 +13 36 07.02 V C57
2021-11-27 10:53:56 s 1 -44312.863 0 +370898.05 7630.0 C57
2021-11-27 11:03:56 S 11 23 23.662 +13 35 59.06 V C57
2021-11-27 11:03:56 s 1 -44659.896 0 +370752.52 1170.0 C57
2021-11-27 11:13:55 S 11 23 24.718 +13 35 46.54 V C57
2021-11-27 11:13:55 s 1 -45006.798 0 +370605.97 4030.0 C57
2021-11-27 11:23:56 S 11 23 25.946 +13 35 40.74 V C57
2021-11-27 11:23:56 s 1 -45353.570 0 +370458.40 6220.0 C57
2021-11-27 11:33:55 S 11 23 26.580 +13 35 32.32 V C57
2021-11-27 11:33:55 s 1 -45700.209 0 +370309.81 7730.0 C57
2021-11-27 13:13:56 S 11 23 36.919 +13 34 13.76 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)