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 21:43:55 s 1 -66552.291 0 +359299.92 6090.0 C57
2021-11-27 21:53:56 S 11 24 30.739 +13 27 02.74 V C57
2021-11-27 21:53:56 s 1 -66888.592 0 +359087.24 6660.0 C57
2021-11-27 22:13:54 S 11 24 32.652 +13 26 49.81 V C57
2021-11-27 22:13:54 s 1 -67560.583 0 +358658.72 4900.0 C57
2021-11-27 23:53:55 S 11 24 42.941 +13 25 30.14 V C57
2021-11-27 23:53:55 s 1 -70908.015 0 +356453.06 6670.0 C57
2021-11-28 00:03:55 S 11 24 44.138 +13 25 18.30 V C57
2021-11-28 00:03:55 s 1 -71241.581 0 +356226.70 4280.0 C57
2021-11-28 00:13:56 S 11 24 44.990 +13 25 11.60 V C57
2021-11-28 00:13:56 s 1 -71574.927 0 +355999.28 860.0 C57
2021-11-28 02:03:56 S 11 24 56.126 +13 23 38.22 V C57
2021-11-28 02:03:56 s 1 -75226.925 0 +353427.82 3670.0 C57
2021-11-28 02:13:55 S 11 24 56.998 +13 23 31.60 V C57
2021-11-28 02:13:55 s 1 -75557.545 0 +353187.69 7470.0 C57
2021-11-28 02:23:56 S 11 24 58.109 +13 23 29.36 V C57
2021-11-28 02:23:56 s 1 -75887.930 0 +352946.49 170.0 C57
2021-11-28 02:33:55 S 11 24 59.251 +13 23 12.23 V C57
2021-11-28 02:33:55 s 1 -76218.077 0 +352704.22 1760.0 C57
2021-11-28 02:53:55 S 11 25 01.402 +13 22 57.04 V C57
2021-11-28 02:53:55 s 1 -76877.657 0 +352216.50 1620.0 C57
2021-11-28 03:03:55 S 11 25 02.602 +13 22 51.56 V C57
2021-11-28 03:03:55 s 1 -77207.087 0 +351971.04 9870.0 C57
2021-11-28 03:13:56 S 11 25 03.247 +13 22 45.95 V C57
2021-11-28 03:13:56 s 1 -77536.274 0 +351724.51 7000.0 C57
2021-11-28 03:23:55 S 11 25 04.658 +13 22 36.23 V C57
2021-11-28 03:23:55 s 1 -77865.218 0 +351476.91 3000.0 C57
2021-11-28 04:53:55 S 11 25 13.841 +13 21 23.08 V C57
2021-11-28 04:53:55 s 1 -80814.549 0 +349200.42 5250.0 C57
2021-11-28 05:13:55 S 11 25 15.840 +13 21 06.95 V C57
2021-11-28 05:13:55 s 1 -81467.168 0 +348682.73 2870.0 C57
2021-11-28 05:23:56 S 11 25 16.752 +13 20 59.10 V C57
2021-11-28 05:23:56 s 1 -81793.089 0 +348422.28 4890.0 C57
2021-11-28 06:03:55 S 11 25 20.875 +13 20 28.75 V C57
2021-11-28 06:03:55 s 1 -83094.152 0 +347369.69 900.0 C57
2021-11-28 07:03:55 S 11 25 27.110 +13 19 33.71 V C57
2021-11-28 07:03:55 s 1 -85037.736 0 +345758.45 8140.0 C57
2021-11-28 07:33:55 S 11 25 29.875 +13 19 16.25 V C57
2021-11-28 07:33:55 s 1 -86005.842 0 +344938.21 9870.0 C57
2021-11-28 07:43:56 S 11 25 31.162 +13 19 03.22 V C57
2021-11-28 07:43:56 s 1 -86327.988 0 +344662.64 4580.0 C57
2021-11-28 07:53:55 S 11 25 32.311 +13 18 58.28 V C57
2021-11-28 07:53:55 s 1 -86649.854 0 +344385.97 8010.0 C57
2021-11-28 08:03:56 S 11 25 33.034 +13 18 44.89 V C57
2021-11-28 08:03:56 s 1 -86971.439 0 +344108.22 150.0 C57
2021-11-28 08:13:55 S 11 25 34.150 +13 18 33.12 V C57
2021-11-28 08:13:55 s 1 -87292.741 0 +343829.38 1000.0 C57
2021-11-28 08:23:56 S 11 25 35.268 +13 18 28.44 V C57
2021-11-28 08:23:56 s 1 -87613.758 0 +343549.46 560.0 C57
2021-11-28 08:33:55 S 11 25 36.074 +13 18 22.00 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)