1627 Ivar (1929 SH)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3973228500 ± 3.37e-09
Semi-major axis (a)1.8630580824 AU ± 4.99e-10
Inclination (i)8.45629236° ± 2.99e-07
Long. of Asc. Node (Ω)133.07459963° ± 2.39e-06
Arg. of Perihelion (ω)167.83961943° ± 2.63e-06
Mean Anomaly (M)311.46100560° ± 6.93e-07
Mean Motion (n)0.3875901077°/day ± 1.56e-10
Perihelion dist (q)1.12282254 AU ± 6.29e-09
Aphelion dist (Q)2.60329363 AU ± 6.32e-09
Orbital Period2.54296037 yr ± 1.02e-09
NGA Modelr2
A2-5.33141704e-16 ± 5.07e-16 AU/d²
Physical Parameters
H (abs. magnitude)12.79
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.120″
Uncertainty0
Orbit TypeAmor
MOID0.108765 AU
Observations Used13532
Radar Obs Used4
Gaia Obs Used222
Oppositions53
Arc Total1929-2025
First Observation Used1929-09-25
Last Observation Used2025-06-15
Observations (18178)
Date Type RA Dec Mag Band Observatory
2021-09-22 11:23:58 S 06 26 40.726 +15 01 20.75 V C57
2021-09-22 11:33:58 S 06 26 41.210 +15 01 21.97 V C57
2021-09-22 11:43:58 S 06 26 41.602 +15 01 20.03 V C57
2021-09-22 11:53:58 S 06 26 42.074 +15 01 16.28 V C57
2021-09-22 12:03:58 S 06 26 42.540 +15 01 17.15 V C57
2021-09-22 12:13:58 S 06 26 42.816 +15 01 12.18 V C57
2021-09-22 13:23:58 S 06 26 46.044 +15 01 04.69 V C57
2021-09-22 13:29:16 C 06 26 44.49 +14 59 57.6 V T05
2021-09-22 13:33:58 S 06 26 46.452 +15 01 04.51 V C57
2021-09-22 13:37:13 C 06 26 44.83 +14 59 56.7 V T05
2021-09-22 13:41:54 C 06 26 45.04 +14 59 56.2 V T05
2021-09-22 13:43:58 S 06 26 46.918 +15 01 02.57 V C57
2021-09-22 13:53:58 S 06 26 47.258 +15 01 02.60 V C57
2021-09-22 14:01:05 C 06 26 45.89 +14 59 53.9 V T05
2021-09-22 14:03:58 S 06 26 47.729 +15 01 01.78 V C57
2021-09-22 14:13:58 S 06 26 48.137 +15 01 01.85 V C57
2021-09-22 14:23:58 S 06 26 48.576 +15 00 59.40 V C57
2021-09-22 14:33:58 S 06 26 49.027 +15 00 57.02 V C57
2021-09-22 14:43:58 S 06 26 49.483 +15 00 58.32 V C57
2021-09-22 14:53:58 S 06 26 50.002 +15 00 56.27 V C57
2021-09-22 15:43:58 S 06 26 52.006 +15 00 50.08 V C57
2021-09-22 15:53:58 S 06 26 52.486 +15 00 49.00 V C57
2021-09-22 16:03:58 S 06 26 52.958 +15 00 46.66 V C57
2021-09-22 16:13:58 S 06 26 53.294 +15 00 44.60 V C57
2021-09-22 16:23:58 S 06 26 53.822 +15 00 44.03 V C57
2021-09-22 16:33:58 S 06 26 54.120 +15 00 44.75 V C57
2021-09-22 16:33:58 s 1 -10279.508 0 +370995.78 4490.0 C57
2021-09-22 16:43:58 S 06 26 54.578 +15 00 41.62 V C57
2021-09-22 16:43:58 s 1 -10658.508 0 +370991.25 1130.0 C57
2021-09-22 16:53:58 S 06 26 55.056 +15 00 40.25 V C57
2021-09-22 16:53:58 s 1 -11037.483 0 +370985.67 7620.0 C57
2021-09-22 17:03:58 S 06 26 55.351 +15 00 40.46 V C57
2021-09-22 17:03:58 s 1 -11416.430 0 +370979.04 3950.0 C57
2021-09-22 18:03:58 S 06 26 58.190 +15 00 32.72 V C57
2021-09-22 18:03:58 s 1 -13689.480 0 +370917.11 8480.0 C57
2021-09-22 18:13:58 S 06 26 58.570 +15 00 27.50 V C57
2021-09-22 18:13:58 s 1 -14068.206 0 +370903.09 3620.0 C57
2021-09-22 18:23:58 S 06 26 59.162 +15 00 27.00 V C57
2021-09-22 18:23:58 s 1 -14446.896 0 +370888.03 8570.0 C57
2021-09-22 18:33:58 S 06 26 59.602 +15 00 28.12 V C57
2021-09-22 18:33:58 s 1 -14825.550 0 +370871.91 3340.0 C57
2021-09-22 18:43:58 S 06 26 59.890 +15 00 26.96 V C57
2021-09-22 18:43:58 s 1 -15204.165 0 +370854.74 7910.0 C57
2021-09-22 18:53:58 S 06 27 00.283 +15 00 23.76 V C57
2021-09-22 18:53:58 s 1 -15582.742 0 +370836.51 2290.0 C57
2021-09-22 19:03:58 S 06 27 00.782 +15 00 23.08 V C57
2021-09-22 19:03:58 s 1 -15961.278 0 +370817.23 6480.0 C57
2021-09-22 19:13:58 S 06 27 01.250 +15 00 22.82 V C57
2021-09-22 19:13:58 s 1 -16339.773 0 +370796.89 450.0 C57
2021-09-22 19:23:58 S 06 27 01.435 +15 00 24.16 V C57
Radar Observations (6)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1985-07-08 08:00:00 20560 6 Hz 2380 -1 -1
1985-07-08.333333 2056000 600 Hz 2380 251 251
1985-07-09 08:09:00 202574571 16 us 2380 -1 -1
1985-07-09.339583 20257457100 16000 us 2380 251 251
2013-06-27 09:40:00 323904701.64 5 us 2380 -1 -1
2013-07-04 09:14:00 321083718.18 5 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)