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
2021-11-22 16:53:56 S 11 11 23.798 +15 06 05.90 V C57
2021-11-22 16:53:56 s 1 +166823.57 5 +229957.52 200.0 C57
2021-11-22 18:23:56 S 11 11 33.149 +15 04 53.94 V C57
2021-11-22 18:23:56 s 1 +165351.35 3 +235237.86 3890.0 C57
2021-11-22 18:43:56 S 11 11 35.285 +15 04 40.48 V C57
2021-11-22 18:43:56 s 1 +165013.66 6 +236396.51 2880.0 C57
2021-11-22 19:03:56 S 11 11 37.368 +15 04 26.47 V C57
2021-11-22 19:03:56 s 1 +164672.22 6 +237549.81 8560.0 C57
2021-11-22 19:13:56 S 11 11 38.297 +15 04 20.53 V C57
2021-11-22 19:13:56 s 1 +164500.11 1 +238124.47 6440.0 C57
2021-11-22 19:23:56 S 11 11 39.809 +15 04 10.78 V C57
2021-11-22 19:23:56 s 1 +164327.07 0 +238697.79 1050.0 C57
2021-11-22 20:53:56 S 11 11 48.986 +15 03 01.19 V C57
2021-11-22 20:53:56 s 1 +162728.77 4 +243798.08 7360.0 C57
2021-11-22 21:03:56 S 11 11 50.570 +15 02 52.91 V C57
2021-11-22 21:03:56 s 1 +162546.71 4 +244358.18 9990.0 C57
2021-11-22 21:13:56 S 11 11 51.221 +15 02 48.26 V C57
2021-11-22 21:13:56 s 1 +162363.77 4 +244916.97 9500.0 C57
2021-11-22 21:23:56 S 11 11 52.207 +15 02 41.03 V C57
2021-11-22 21:23:56 s 1 +162179.95 9 +245474.45 5920.0 C57
2021-11-22 21:33:56 S 11 11 53.107 +15 02 30.08 V C57
2021-11-22 21:33:56 s 1 +161995.27 2 +246030.61 9250.0 C57
2021-11-22 21:43:56 S 11 11 54.370 +15 02 23.10 V C57
2021-11-22 21:43:56 s 1 +161809.71 7 +246585.47 9510.0 C57
2021-11-22 22:03:56 S 11 11 56.885 +15 02 03.91 V C57
2021-11-22 22:03:56 s 1 +161436.02 1 +247691.26 870.0 C57
2021-11-22 23:33:56 S 11 12 05.880 +15 00 59.36 V C57
2021-11-22 23:33:56 s 1 +159712.46 2 +252602.89 3700.0 C57
2021-11-22 23:43:56 S 11 12 07.186 +15 00 51.66 V C57
2021-11-22 23:43:56 s 1 +159516.79 6 +253142.15 8200.0 C57
2021-11-22 23:53:56 S 11 12 08.501 +15 00 45.65 V C57
2021-11-22 23:53:56 s 1 +159320.31 2 +253680.12 9810.0 C57
2021-11-23 00:03:56 S 11 12 09.415 +15 00 36.79 V C57
2021-11-23 00:03:56 s 1 +159123.01 3 +254216.80 8550.0 C57
2021-11-23 00:13:56 S 11 12 10.457 +15 00 25.92 V C57
2021-11-23 00:13:56 s 1 +158924.90 3 +254752.19 4410.0 C57
2021-11-23 00:23:56 S 11 12 11.450 +15 00 21.60 V C57
2021-11-23 00:23:56 s 1 +158725.98 6 +255286.30 7430.0 C57
2021-11-23 00:33:56 S 11 12 12.926 +15 00 14.11 V C57
2021-11-23 00:33:56 s 1 +158526.26 5 +255819.12 7610.0 C57
2021-11-23 02:03:56 S 11 12 22.298 +14 58 58.33 V C57
2021-11-23 02:03:56 s 1 +156693.18 5 +260556.95 3640.0 C57
2021-11-23 02:13:56 S 11 12 22.990 +14 58 56.71 V C57
2021-11-23 02:13:56 s 1 +156485.61 9 +261077.00 6140.0 C57
2021-11-23 02:23:56 S 11 12 24.410 +14 58 49.76 V C57
2021-11-23 02:23:56 s 1 +156277.28 7 +261595.78 5950.0 C57
2021-11-23 02:33:56 S 11 12 25.526 +14 58 38.50 V C57
2021-11-23 02:33:56 s 1 +156068.19 2 +262113.30 3070.0 C57
2021-11-23 02:43:56 S 11 12 26.544 +14 58 31.26 V C57
2021-11-23 02:43:56 s 1 +155858.33 9 +262629.55 7520.0 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)