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
2021-12-07 08:23:55 s 1 +117555.98 3 +330874.37 6810.0 C57
2021-12-07 08:33:55 S 11 48 34.231 +10 13 06.17 V C57
2021-12-07 08:33:55 s 1 +117268.28 4 +331215.62 2820.0 C57
2021-12-07 08:43:55 S 11 48 35.323 +10 12 56.88 V C57
2021-12-07 08:43:55 s 1 +116980.20 0 +331555.80 7480.0 C57
2021-12-07 08:53:55 S 11 48 36.358 +10 12 48.56 V C57
2021-12-07 08:53:55 s 1 +116691.73 2 +331894.92 800.0 C57
2021-12-07 09:03:55 S 11 48 37.622 +10 12 39.56 V C57
2021-12-07 09:03:55 s 1 +116402.88 2 +332232.97 2800.0 C57
2021-12-07 09:13:55 S 11 48 38.990 +10 12 25.09 V C57
2021-12-07 09:13:55 s 1 +116113.65 3 +332569.97 3470.0 C57
2021-12-07 10:33:55 S 11 48 47.652 +10 11 15.68 V C57
2021-12-07 10:33:55 s 1 +113786.30 8 +335227.83 1860.0 C57
2021-12-07 10:43:55 S 11 48 48.775 +10 11 08.81 V C57
2021-12-07 10:43:55 s 1 +113493.72 6 +335555.32 880.0 C57
2021-12-07 10:53:55 S 11 48 49.656 +10 10 56.14 V C57
2021-12-07 10:53:55 s 1 +113200.77 8 +335881.75 8640.0 C57
2021-12-07 11:03:55 S 11 48 50.801 +10 10 50.99 V C57
2021-12-07 11:03:55 s 1 +112907.46 8 +336207.12 5140.0 C57
2021-12-07 11:13:55 S 11 48 51.864 +10 10 39.18 V C57
2021-12-07 11:13:55 s 1 +112613.79 6 +336531.45 390.0 C57
2021-12-07 11:23:55 S 11 48 53.014 +10 10 29.24 V C57
2021-12-07 11:23:55 s 1 +112319.76 3 +336854.72 4390.0 C57
2021-12-07 11:33:55 S 11 48 54.300 +10 10 22.04 V C57
2021-12-07 11:33:55 s 1 +112025.37 2 +337176.95 7150.0 C57
2021-12-07 11:43:55 S 11 48 55.130 +10 10 11.93 V C57
2021-12-07 11:43:55 s 1 +111730.62 4 +337498.12 8680.0 C57
2021-12-07 12:03:55 S 11 48 57.578 +10 09 48.42 V C57
2021-12-07 12:03:55 s 1 +111140.06 2 +338137.33 8060.0 C57
2021-12-07 13:23:55 S 11 49 06.139 +10 08 43.04 V C57
2021-12-07 13:23:55 s 1 +108763.82 8 +340652.33 7360.0 C57
2021-12-07 13:33:55 S 11 49 07.349 +10 08 28.61 V C57
2021-12-07 13:33:55 s 1 +108465.25 0 +340962.01 5700.0 C57
2021-12-07 13:43:55 S 11 49 08.513 +10 08 19.10 V C57
2021-12-07 13:43:55 s 1 +108166.33 2 +341270.65 2870.0 C57
2021-12-07 13:53:55 S 11 49 09.504 +10 08 11.87 V C57
2021-12-07 13:53:55 s 1 +107867.07 6 +341578.26 8880.0 C57
2021-12-07 14:03:55 S 11 49 10.687 +10 08 02.29 V C57
2021-12-07 14:03:55 s 1 +107567.48 4 +341884.82 3740.0 C57
2021-12-07 14:33:55 S 11 49 13.910 +10 07 35.90 V C57
2021-12-07 14:33:55 s 1 +106666.70 3 +342798.28 1450.0 C57
2021-12-07 15:53:55 S 11 49 22.560 +10 06 23.90 V C57
2021-12-07 15:53:55 s 1 +104250.17 0 +345188.64 2650.0 C57
2021-12-07 16:03:55 S 11 49 24.180 +10 06 11.81 V C57
2021-12-07 16:03:55 s 1 +103946.65 0 +345482.79 4100.0 C57
2021-12-07 16:13:55 S 11 49 24.710 +10 06 03.74 V C57
2021-12-07 16:13:55 s 1 +103642.81 3 +345775.90 4470.0 C57
2021-12-07 16:23:55 S 11 49 26.018 +10 05 53.92 V C57
2021-12-07 16:23:55 s 1 +103338.65 9 +346067.99 3770.0 C57
2021-12-07 16:33:55 S 11 49 27.077 +10 05 44.41 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)