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
2021-12-21 15:13:55 S 12 26 54.746 +04 31 03.11 V C57
2021-12-21 15:13:55 s 1 +93247.285 0 +353238.70 2090.0 C57
2021-12-21 15:23:55 S 12 26 56.340 +04 30 49.50 V C57
2021-12-21 15:23:55 s 1 +92925.849 0 +353501.51 2960.0 C57
2021-12-21 15:33:54 S 12 26 57.082 +04 30 40.46 V C57
2021-12-21 15:33:54 s 1 +92604.133 0 +353763.29 2910.0 C57
2021-12-21 15:53:54 S 12 26 59.909 +04 30 17.64 V C57
2021-12-21 15:53:54 s 1 +91959.868 0 +354283.75 70.0 C57
2021-12-21 16:03:55 S 12 27 01.022 +04 30 05.58 V C57
2021-12-21 16:03:55 s 1 +91637.322 0 +354542.43 7290.0 C57
2021-12-21 16:33:55 S 12 27 04.435 +04 29 30.84 V C57
2021-12-21 16:33:55 s 1 +90668.042 0 +355312.31 3580.0 C57
2021-12-21 16:43:54 S 12 27 05.606 +04 29 20.40 V C57
2021-12-21 16:43:54 s 1 +90344.406 0 +355566.88 7240.0 C57
2021-12-21 17:03:54 S 12 27 08.081 +04 28 58.33 V C57
2021-12-21 17:03:54 s 1 +89696.328 0 +356072.93 1930.0 C57
2021-12-21 17:23:54 S 12 27 10.346 +04 28 37.96 V C57
2021-12-21 17:23:54 s 1 +89047.184 0 +356574.88 3150.0 C57
2021-12-21 17:33:55 S 12 27 11.710 +04 28 25.39 V C57
2021-12-21 17:33:55 s 1 +88722.215 0 +356824.31 2480.0 C57
2021-12-21 17:43:54 S 12 27 12.778 +04 28 14.38 V C57
2021-12-21 17:43:54 s 1 +88396.983 0 +357072.72 950.0 C57
2021-12-21 17:53:55 S 12 27 14.059 +04 28 05.02 V C57
2021-12-21 17:53:55 s 1 +88071.490 0 +357320.11 8570.0 C57
2021-12-21 18:03:55 S 12 27 15.557 +04 27 54.58 V C57
2021-12-21 18:03:55 s 1 +87745.737 0 +357566.47 5360.0 C57
2021-12-21 18:53:54 S 12 27 21.166 +04 26 54.02 V C57
2021-12-21 18:53:54 s 1 +86113.108 0 +358782.94 6830.0 C57
2021-12-21 19:03:55 S 12 27 22.565 +04 26 47.26 V C57
2021-12-21 19:03:55 s 1 +85785.819 0 +359023.16 8680.0 C57
2021-12-21 19:13:54 S 12 27 23.626 +04 26 36.60 V C57
2021-12-21 19:13:54 s 1 +85458.279 0 +359262.37 9710.0 C57
2021-12-21 19:23:55 S 12 27 24.799 +04 26 20.36 V C57
2021-12-21 19:23:55 s 1 +85130.488 0 +359500.56 9950.0 C57
2021-12-21 19:33:55 S 12 27 25.906 +04 26 13.31 V C57
2021-12-21 19:33:55 s 1 +84802.448 0 +359737.73 9390.0 C57
2021-12-21 19:43:54 S 12 27 27.209 +04 25 58.80 V C57
2021-12-21 19:43:54 s 1 +84474.161 0 +359973.89 8050.0 C57
2021-12-21 20:13:55 S 12 27 30.799 +04 25 26.69 V C57
2021-12-21 20:13:55 s 1 +83487.823 0 +360676.24 9310.0 C57
2021-12-21 22:03:55 S 12 27 43.946 +04 23 25.40 V C57
2021-12-21 22:03:55 s 1 +79852.789 0 +363173.35 8980.0 C57
2021-12-21 22:23:54 S 12 27 46.294 +04 22 59.30 V C57
2021-12-21 22:23:54 s 1 +79188.840 0 +363614.20 3060.0 C57
2021-12-21 22:33:55 S 12 27 47.520 +04 22 49.84 V C57
2021-12-21 22:33:55 s 1 +78856.524 0 +363833.12 9040.0 C57
2021-12-21 22:43:54 S 12 27 48.653 +04 22 38.82 V C57
2021-12-21 22:43:54 s 1 +78523.982 0 +364051.02 4310.0 C57
2021-12-21 22:53:55 S 12 27 49.920 +04 22 28.45 V C57
2021-12-21 22:53:55 s 1 +78191.214 0 +364267.91 8890.0 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)