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
2021-11-12 10:33:56 s 1 +50091.323 0 +371401.90 8880.0 C57
2021-11-12 10:53:56 S 10 46 13.164 +18 03 57.46 V C57
2021-11-12 10:53:56 s 1 +49399.083 0 +371654.09 9910.0 C57
2021-11-12 11:03:56 S 10 46 14.136 +18 03 50.72 V C57
2021-11-12 11:03:56 s 1 +49052.760 0 +371778.67 4850.0 C57
2021-11-12 11:23:56 S 10 46 16.426 +18 03 39.78 V C57
2021-11-12 11:23:56 s 1 +48359.713 0 +372024.81 3610.0 C57
2021-11-12 12:53:56 S 10 46 25.795 +18 02 37.57 V C57
2021-11-12 12:53:56 s 1 +45234.585 0 +373082.70 5150.0 C57
2021-11-12 13:03:56 S 10 46 26.556 +18 02 26.09 V C57
2021-11-12 13:03:56 s 1 +44886.720 0 +373195.23 5810.0 C57
2021-11-12 13:13:56 S 10 46 27.514 +18 02 17.84 V C57
2021-11-12 13:13:56 s 1 +44538.734 0 +373306.75 6140.0 C57
2021-11-12 13:23:56 S 10 46 28.754 +18 02 14.10 V C57
2021-11-12 13:23:56 s 1 +44190.627 0 +373417.26 6150.0 C57
2021-11-12 13:33:56 S 10 46 29.942 +18 02 06.43 V C57
2021-11-12 13:33:56 s 1 +43842.400 0 +373526.78 5830.0 C57
2021-11-12 13:43:56 S 10 46 30.931 +18 02 04.34 V C57
2021-11-12 13:43:56 s 1 +43494.055 0 +373635.29 5180.0 C57
2021-11-12 14:03:56 S 10 46 33.014 +18 01 51.31 V C57
2021-11-12 14:03:56 s 1 +42797.011 0 +373849.30 2950.0 C57
2021-11-12 16:03:56 S 10 46 45.046 +18 00 25.67 V C57
2021-11-12 16:03:56 s 1 +38605.291 0 +375049.26 4580.0 C57
2021-11-12 16:13:56 S 10 46 46.454 +18 00 19.19 V C57
2021-11-12 16:13:56 s 1 +38255.281 0 +375142.76 9570.0 C57
2021-11-12 16:23:56 S 10 46 46.831 +18 00 10.98 V C57
2021-11-12 16:23:56 s 1 +37905.169 0 +375235.25 4300.0 C57
2021-11-12 18:23:56 S 10 46 59.333 +17 58 51.60 V C57
2021-11-12 18:23:56 s 1 +33696.139 0 +376267.25 1960.0 C57
2021-11-12 18:33:56 S 10 47 00.542 +17 58 42.67 V C57
2021-11-12 18:33:56 s 1 +33344.776 0 +376346.76 3620.0 C57
2021-11-12 19:03:56 S 10 47 03.377 +17 58 22.91 V C57
2021-11-12 19:03:56 s 1 +32290.154 0 +376579.31 7350.0 C57
2021-11-12 20:33:56 S 10 47 12.763 +17 57 24.19 V C57
2021-11-12 20:33:56 s 1 +29121.723 0 +377223.12 8140.0 C57
2021-11-12 21:03:56 S 10 47 15.948 +17 56 58.74 V C57
2021-11-12 21:03:56 s 1 +28064.144 0 +377419.79 5270.0 C57
2021-11-12 21:13:56 S 10 47 16.937 +17 56 49.16 V C57
2021-11-12 21:13:56 s 1 +27711.466 0 +377483.36 3990.0 C57
2021-11-12 21:23:56 S 10 47 17.544 +17 56 44.16 V C57
2021-11-12 21:23:56 s 1 +27358.715 0 +377545.92 2570.0 C57
2021-11-12 21:43:56 S 10 47 19.882 +17 56 32.53 V C57
2021-11-12 21:43:56 s 1 +26652.993 0 +377668.08 9260.0 C57
2021-11-12 23:33:56 S 10 47 31.270 +17 55 13.33 V C57
2021-11-12 23:33:56 s 1 +22766.641 0 +378268.75 1730.0 C57
2021-11-12 23:53:56 S 10 47 33.473 +17 55 06.10 V C57
2021-11-12 23:53:56 s 1 +22059.206 0 +378365.03 5250.0 C57
2021-11-13 00:03:56 S 10 47 33.941 +17 55 00.37 V C57
2021-11-13 00:03:56 s 1 +21705.399 0 +378411.68 1870.0 C57
2021-11-13 00:13:56 S 10 47 35.098 +17 54 48.49 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)