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
2021-10-05 04:33:58 S 06 38 33.382 +14 24 51.01 V C57
2021-10-05 04:33:58 s 1 +30093.723 0 +368642.42 3810.0 C57
2021-10-05 06:03:58 S 06 38 35.983 +14 24 36.79 V C57
2021-10-05 06:03:58 s 1 +26749.451 0 +369349.28 8700.0 C57
2021-10-05 06:13:57 S 06 38 36.221 +14 24 38.92 V C57
2021-10-05 06:13:57 s 1 +26377.532 0 +369422.56 5030.0 C57
2021-10-05 06:23:58 S 06 38 36.684 +14 24 35.96 V C57
2021-10-05 06:23:58 s 1 +26005.550 0 +369494.78 1200.0 C57
2021-10-05 06:33:58 S 06 38 36.955 +14 24 35.14 V C57
2021-10-05 06:33:58 s 1 +25633.507 0 +369565.95 7220.0 C57
2021-10-05 06:43:58 S 06 38 37.234 +14 24 32.72 V C57
2021-10-05 06:43:58 s 1 +25261.403 0 +369636.07 3080.0 C57
2021-10-05 06:53:58 S 06 38 37.476 +14 24 31.75 V C57
2021-10-05 06:53:58 s 1 +24889.240 0 +369705.14 8780.0 C57
2021-10-05 07:03:58 S 06 38 38.040 +14 24 29.74 V C57
2021-10-05 07:03:58 s 1 +24517.018 0 +369773.16 4340.0 C57
2021-10-05 07:13:58 S 06 38 38.177 +14 24 31.00 V C57
2021-10-05 07:13:58 s 1 +24144.739 0 +369840.13 9760.0 C57
2021-10-05 08:33:58 S 06 38 40.603 +14 24 18.04 V C57
2021-10-05 08:33:58 s 1 +21164.573 0 +370338.03 8300.0 C57
2021-10-05 08:43:58 S 06 38 40.678 +14 24 15.16 V C57
2021-10-05 08:43:58 s 1 +20791.826 0 +370395.55 2570.0 C57
2021-10-05 08:53:58 S 06 38 41.167 +14 24 16.27 V C57
2021-10-05 08:53:58 s 1 +20419.033 0 +370452.01 6730.0 C57
2021-10-05 09:03:58 S 06 38 41.407 +14 24 15.73 V C57
2021-10-05 09:03:58 s 1 +20046.195 0 +370507.42 790.0 C57
2021-10-05 09:13:57 S 06 38 41.599 +14 24 11.52 V C57
2021-10-05 09:13:57 s 1 +19673.312 0 +370561.79 4750.0 C57
2021-10-05 09:23:58 S 06 38 41.990 +14 24 11.74 V C57
2021-10-05 09:23:58 s 1 +19300.385 0 +370615.10 8610.0 C57
2021-10-05 09:33:58 S 06 38 42.420 +14 24 09.83 V C57
2021-10-05 09:33:58 s 1 +18927.417 0 +370667.37 2370.0 C57
2021-10-05 11:33:58 S 06 38 45.778 +14 23 56.11 V C57
2021-10-05 11:33:58 s 1 +14448.877 0 +371212.77 1390.0 C57
2021-10-05 11:43:58 S 06 38 46.193 +14 23 54.56 V C57
2021-10-05 11:43:58 s 1 +14075.455 0 +371251.41 4230.0 C57
2021-10-05 11:53:57 S 06 38 46.342 +14 23 51.68 V C57
2021-10-05 11:53:57 s 1 +13702.005 0 +371289.00 7030.0 C57
2021-10-05 12:03:58 S 06 38 46.884 +14 23 45.89 V C57
2021-10-05 12:03:58 s 1 +13328.529 0 +371325.54 9790.0 C57
2021-10-05 13:03:58 S 06 38 48.456 +14 23 43.08 V C57
2021-10-05 13:03:58 s 1 +11087.175 0 +371522.82 5620.0 C57
2021-10-05 13:33:58 S 06 38 49.498 +14 23 42.40 V C57
2021-10-05 13:43:57 S 06 38 49.747 +14 23 39.91 V C57
2021-10-05 13:53:58 S 06 38 50.182 +14 23 39.01 V C57
2021-10-05 14:03:58 S 06 38 50.338 +14 23 35.84 V C57
2021-10-05 14:23:58 S 06 38 50.808 +14 23 31.38 V C57
2021-10-05 15:23:58 S 06 38 52.865 +14 23 26.05 V C57
2021-10-05 15:33:58 S 06 38 53.102 +14 23 24.94 V C57
2021-10-05 15:43:58 S 06 38 53.239 +14 23 22.34 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)