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
2021-12-11 16:33:54 s 1 -91226.140 0 +353539.43 4950.0 C57
2021-12-11 16:43:54 S 11 59 56.234 +08 34 48.54 V C57
2021-12-11 16:43:54 s 1 -91544.256 0 +353274.72 290.0 C57
2021-12-11 16:53:54 S 11 59 57.257 +08 34 34.50 V C57
2021-12-11 16:53:54 s 1 -91862.112 0 +353008.99 4310.0 C57
2021-12-11 17:03:54 S 11 59 58.454 +08 34 23.84 V C57
2021-12-11 17:03:54 s 1 -92179.706 0 +352742.26 7020.0 C57
2021-12-11 17:13:54 S 11 59 59.285 +08 34 15.92 V C57
2021-12-11 17:13:54 s 1 -92497.039 0 +352474.51 8400.0 C57
2021-12-11 17:23:54 S 12 00 00.602 +08 34 05.66 V C57
2021-12-11 17:23:54 s 1 -92814.108 0 +352205.74 8450.0 C57
2021-12-11 17:33:54 S 12 00 01.747 +08 33 58.14 V C57
2021-12-11 17:33:54 s 1 -93130.912 0 +351935.97 7170.0 C57
2021-12-11 18:03:54 S 12 00 04.884 +08 33 22.32 V C57
2021-12-11 18:03:54 s 1 -94079.722 0 +351120.54 5260.0 C57
2021-12-11 18:53:54 S 12 00 10.450 +08 32 39.95 V C57
2021-12-11 18:53:54 s 1 -95655.653 0 +349741.16 8180.0 C57
2021-12-11 19:03:54 S 12 00 11.230 +08 32 25.55 V C57
2021-12-11 19:03:54 s 1 -95970.015 0 +349462.23 4640.0 C57
2021-12-11 19:13:54 S 12 00 12.588 +08 32 17.34 V C57
2021-12-11 19:13:54 s 1 -96284.099 0 +349182.27 9700.0 C57
2021-12-11 19:23:54 S 12 00 13.618 +08 32 09.74 V C57
2021-12-11 19:23:54 s 1 -96597.903 0 +348901.30 3360.0 C57
2021-12-11 19:33:54 S 12 00 14.738 +08 31 59.88 V C57
2021-12-11 19:33:54 s 1 -96911.428 0 +348619.30 5620.0 C57
2021-12-11 19:43:54 S 12 00 15.761 +08 31 45.70 V C57
2021-12-11 19:43:54 s 1 -97224.670 0 +348336.28 6480.0 C57
2021-12-11 19:53:54 S 12 00 16.757 +08 31 37.02 V C57
2021-12-11 19:53:54 s 1 -97537.629 0 +348052.24 5910.0 C57
2021-12-11 20:03:54 S 12 00 17.897 +08 31 30.58 V C57
2021-12-11 20:03:54 s 1 -97850.304 0 +347767.18 3930.0 C57
2021-12-11 20:13:54 S 12 00 18.989 +08 31 22.40 V C57
2021-12-11 20:13:54 s 1 -98162.692 0 +347481.09 530.0 C57
2021-12-11 21:53:54 S 12 00 29.777 +08 29 42.18 V C57
2021-12-11 21:53:54 s 1 -101270.55 8 +344563.73 6780.0 C57
2021-12-11 22:03:54 S 12 00 30.612 +08 29 34.48 V C57
2021-12-11 22:03:54 s 1 -101579.71 3 +344266.34 7300.0 C57
2021-12-11 22:13:54 S 12 00 31.870 +08 29 23.71 V C57
2021-12-11 22:13:54 s 1 -101888.56 5 +343967.91 6330.0 C57
2021-12-11 22:23:54 S 12 00 33.046 +08 29 13.74 V C57
2021-12-11 22:23:54 s 1 -102197.11 3 +343668.45 3860.0 C57
2021-12-11 22:33:54 S 12 00 33.965 +08 29 05.39 V C57
2021-12-11 22:33:54 s 1 -102505.35 6 +343367.95 9880.0 C57
2021-12-11 22:43:54 S 12 00 34.987 +08 28 53.18 V C57
2021-12-11 22:43:54 s 1 -102813.29 3 +343066.43 4380.0 C57
2021-12-11 22:53:54 S 12 00 35.947 +08 28 44.29 V C57
2021-12-11 22:53:54 s 1 -103120.92 2 +342763.86 7370.0 C57
2021-12-11 23:03:54 S 12 00 37.092 +08 28 39.43 V C57
2021-12-11 23:03:54 s 1 -103428.24 1 +342460.27 8830.0 C57
2021-12-12 00:13:54 S 12 00 44.714 +08 27 27.40 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)