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
2021-12-01 22:23:55 s 1 -146092.62 0 +26671.859 9890.0 C57
2021-12-01 22:33:55 S 11 34 14.393 +12 06 24.80 V C57
2021-12-01 22:33:55 s 1 -145674.94 2 +25677.648 1500.0 C57
2021-12-01 22:43:55 S 11 34 15.886 +12 06 14.04 V C57
2021-12-01 22:43:55 s 1 -145252.04 7 +24682.511 2310.0 C57
2021-12-01 23:53:55 S 11 34 22.937 +12 05 21.88 V C57
2021-12-01 23:53:55 s 1 -142141.78 9 +17692.803 690.0 C57
2021-12-02 00:33:55 S 11 34 26.460 +12 04 44.94 V C57
2021-12-02 00:33:55 s 1 -140242.44 5 +13682.565 7240.0 C57
2021-12-02 00:43:55 S 11 34 27.634 +12 04 36.30 V C57
2021-12-02 00:43:55 s 1 -139753.24 6 +12678.488 4350.0 C57
2021-12-02 00:53:55 S 11 34 28.560 +12 04 26.36 V C57
2021-12-02 00:53:55 s 1 -139258.20 1 +11673.873 8260.0 C57
2021-12-02 01:03:55 S 11 34 29.390 +12 04 17.76 V C57
2021-12-02 01:03:55 s 1 -138757.25 8 +10668.756 8760.0 C57
2021-12-02 01:13:55 S 11 34 30.576 +12 04 09.73 V C57
2021-12-02 01:13:55 s 1 -138250.36 5 + 9663.173 5680.0 C57
2021-12-02 02:43:55 S 11 34 39.360 +12 02 55.25 V C57
2021-12-02 02:43:55 s 1 -133411.76 0 + 598.585 2840.0 C57
2021-12-02 02:53:55 S 11 34 40.507 +12 02 50.89 V C57
2021-12-02 02:53:55 s 1 -132842.40 4 - 409.390 2610.0 C57
2021-12-04 23:33:55 S 11 42 12.180 +11 04 22.66 V C57
2021-12-04 23:33:55 s 1 +176663.00 3 +145003.51 2300.0 C57
2021-12-04 23:43:55 S 11 42 13.296 +11 04 13.55 V C57
2021-12-04 23:43:55 s 1 +176680.64 3 +145778.80 9810.0 C57
2021-12-05 01:33:55 S 11 42 25.867 +11 02 34.69 V C57
2021-12-05 01:33:55 s 1 +176753.60 7 +154206.11 2830.0 C57
2021-12-05 01:53:55 S 11 42 27.967 +11 02 19.61 V C57
2021-12-05 01:53:55 s 1 +176743.67 2 +155718.57 6290.0 C57
2021-12-05 03:53:55 S 11 42 41.645 +11 00 35.06 V C57
2021-12-05 03:53:55 s 1 +176541.22 3 +164666.49 6120.0 C57
2021-12-05 04:03:55 S 11 42 42.744 +11 00 24.26 V C57
2021-12-05 04:03:55 s 1 +176513.61 1 +165402.38 2130.0 C57
2021-12-05 04:13:55 S 11 42 43.865 +11 00 14.04 V C57
2021-12-05 04:13:55 s 1 +176484.39 0 +166136.78 2060.0 C57
2021-12-05 04:43:55 S 11 42 47.158 +10 59 51.86 V C57
2021-12-05 04:43:55 s 1 +176387.16 1 +168331.02 5680.0 C57
2021-12-05 06:43:55 S 11 43 00.890 +10 58 03.61 V C57
2021-12-05 06:43:55 s 1 +175858.94 7 +176974.42 4170.0 C57
2021-12-05 07:03:55 S 11 43 03.077 +10 57 43.99 V C57
2021-12-05 07:03:55 s 1 +175749.90 9 +178394.34 3020.0 C57
2021-12-05 07:13:55 S 11 43 04.181 +10 57 36.54 V C57
2021-12-05 07:13:55 s 1 +175693.20 0 +179102.10 9190.0 C57
2021-12-05 07:23:55 S 11 43 05.441 +10 57 26.03 V C57
2021-12-05 07:23:55 s 1 +175635.04 3 +179808.40 9910.0 C57
2021-12-05 09:13:55 S 11 43 17.998 +10 55 46.56 V C57
2021-12-05 09:13:55 s 1 +174901.86 3 +187481.54 5870.0 C57
2021-12-05 09:23:55 S 11 43 18.725 +10 55 42.24 V C57
2021-12-05 09:23:55 s 1 +174826.90 9 +188170.40 3350.0 C57
2021-12-05 09:33:55 S 11 43 19.718 +10 55 30.54 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)