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
2021-12-20 02:13:55 s 1 +154760.69 2 +267985.12 4780.0 C57
2021-12-20 02:23:55 S 12 22 29.746 +05 11 33.04 V C57
2021-12-20 02:23:55 s 1 +154543.51 8 +268496.67 1090.0 C57
2021-12-20 02:33:55 S 12 22 30.708 +05 11 24.86 V C57
2021-12-20 02:33:55 s 1 +154325.62 3 +269006.98 4690.0 C57
2021-12-20 02:43:55 S 12 22 31.750 +05 11 12.26 V C57
2021-12-20 02:43:55 s 1 +154107.01 0 +269516.06 5590.0 C57
2021-12-20 02:53:55 S 12 22 33.317 +05 11 01.57 V C57
2021-12-20 02:53:55 s 1 +153887.68 2 +270023.92 3810.0 C57
2021-12-20 04:13:55 S 12 22 43.008 +05 09 34.02 V C57
2021-12-20 04:13:55 s 1 +152107.67 4 +274042.55 4530.0 C57
2021-12-20 04:23:55 S 12 22 44.165 +05 09 22.28 V C57
2021-12-20 04:23:55 s 1 +151882.04 5 +274539.38 9160.0 C57
2021-12-20 04:33:55 S 12 22 45.317 +05 09 14.83 V C57
2021-12-20 04:33:55 s 1 +151655.73 1 +275034.98 1240.0 C57
2021-12-20 04:43:55 S 12 22 46.519 +05 09 02.56 V C57
2021-12-20 04:43:55 s 1 +151428.73 4 +275529.37 760.0 C57
2021-12-20 04:53:55 S 12 22 47.755 +05 08 51.86 V C57
2021-12-20 04:53:55 s 1 +151201.05 8 +276022.55 7750.0 C57
2021-12-20 05:03:55 S 12 22 48.970 +05 08 41.21 V C57
2021-12-20 05:03:55 s 1 +150972.70 6 +276514.51 2210.0 C57
2021-12-20 05:13:55 S 12 22 50.081 +05 08 32.32 V C57
2021-12-20 05:13:55 s 1 +150743.67 9 +277005.25 4150.0 C57
2021-12-20 05:23:55 S 12 22 51.017 +05 08 16.37 V C57
2021-12-20 05:23:55 s 1 +150513.98 2 +277494.79 3590.0 C57
2021-12-20 05:33:55 S 12 22 52.462 +05 08 07.26 V C57
2021-12-20 05:33:55 s 1 +150283.61 7 +277983.11 540.0 C57
2021-12-20 06:23:55 S 12 22 58.786 +05 07 11.86 V C57
2021-12-20 06:23:55 s 1 +149121.87 0 +280406.59 8310.0 C57
2021-12-20 06:33:55 S 12 22 59.844 +05 07 04.30 V C57
2021-12-20 06:33:55 s 1 +148887.55 6 +280887.67 540.0 C57
2021-12-20 06:43:55 S 12 23 00.830 +05 06 51.34 V C57
2021-12-20 06:43:55 s 1 +148652.59 3 +281367.54 360.0 C57
2021-12-20 06:53:55 S 12 23 02.052 +05 06 38.63 V C57
2021-12-20 06:53:55 s 1 +148416.98 4 +281846.22 7780.0 C57
2021-12-20 07:03:55 S 12 23 03.365 +05 06 30.06 V C57
2021-12-20 07:03:55 s 1 +148180.73 3 +282323.69 2810.0 C57
2021-12-20 07:13:55 S 12 23 04.502 +05 06 20.88 V C57
2021-12-20 07:13:55 s 1 +147943.84 1 +282799.97 5460.0 C57
2021-12-20 07:23:55 S 12 23 05.736 +05 06 09.07 V C57
2021-12-20 07:23:55 s 1 +147706.31 1 +283275.04 5730.0 C57
2021-12-20 07:43:55 S 12 23 08.126 +05 05 46.79 V C57
2021-12-20 07:43:55 s 1 +147229.34 9 +284221.61 9220.0 C57
2021-12-20 08:03:55 S 12 23 10.327 +05 05 24.32 V C57
2021-12-20 08:03:55 s 1 +146749.86 8 +285163.39 3360.0 C57
2021-12-20 08:13:55 S 12 23 11.827 +05 05 13.16 V C57
2021-12-20 08:13:55 s 1 +146509.19 0 +285632.49 1950.0 C57
2021-12-20 09:03:55 S 12 23 17.698 +05 04 23.81 V C57
2021-12-20 09:03:55 s 1 +145296.52 4 +287960.17 510.0 C57
2021-12-20 09:13:55 S 12 23 18.780 +05 04 10.02 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)