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
2021-11-26 11:13:55 S 06 32 57.067 +12 50 57.84 V C57
2021-11-26 11:23:54 S 06 32 56.628 +12 50 56.94 V C57
2021-11-26 11:33:55 S 06 32 56.244 +12 50 57.52 V C57
2021-11-26 11:43:54 S 06 32 55.663 +12 50 57.88 V C57
2021-11-26 11:53:54 S 06 32 55.262 +12 50 58.34 V C57
2021-11-26 12:03:55 S 06 32 54.780 +12 50 57.26 V C57
2021-11-26 12:13:54 S 06 32 54.322 +12 50 57.59 V C57
2021-11-26 12:23:55 S 06 32 53.794 +12 50 58.20 V C57
2021-11-26 12:33:54 S 06 32 53.453 +12 50 58.45 V C57
2021-11-26 12:43:55 S 06 32 52.939 +12 50 57.73 V C57
2021-11-26 12:53:54 S 06 32 52.469 +12 50 58.20 V C57
2021-11-26 13:03:54 S 06 32 52.099 +12 50 57.98 V C57
2021-11-26 13:13:54 S 06 32 51.540 +12 50 58.34 V C57
2021-11-26 13:23:54 S 06 32 51.038 +12 50 57.55 V C57
2021-11-26 13:33:55 S 06 32 50.686 +12 50 59.28 V C57
2021-11-26 13:43:54 S 06 32 50.347 +12 50 57.55 V C57
2021-11-26 14:03:54 S 06 32 49.334 +12 50 58.24 V C57
2021-11-26 14:13:55 S 06 32 48.876 +12 50 58.06 V C57
2021-11-26 14:23:54 S 06 32 48.113 +12 50 58.20 V C57
2021-11-26 14:43:54 S 06 32 47.590 +12 50 57.84 V C57
2021-11-26 14:53:54 S 06 32 46.973 +12 50 56.26 V C57
2021-11-26 15:03:55 S 06 32 46.464 +12 50 58.60 V C57
2021-11-26 15:13:54 S 06 32 46.282 +12 50 55.39 V C57
2021-11-26 15:33:54 S 06 32 45.288 +12 51 01.55 V C57
2021-11-26 15:53:54 S 06 32 44.338 +12 50 56.90 V C57
2021-11-26 16:23:54 S 06 32 42.763 +12 50 59.50 V C57
2021-11-26 16:33:55 S 06 32 42.288 +12 50 58.09 V C57
2021-11-26 16:43:54 S 06 32 41.914 +12 50 59.53 V C57
2021-11-26 16:53:55 S 06 32 41.410 +12 50 59.82 V C57
2021-11-26 17:03:54 S 06 32 41.057 +12 50 59.53 V C57
2021-11-26 17:13:55 S 06 32 40.488 +12 50 59.53 V C57
2021-11-26 17:23:54 S 06 32 40.020 +12 50 59.39 V C57
2021-11-26 17:33:54 S 06 32 39.636 +12 50 59.86 V C57
2021-11-26 17:43:54 S 06 32 39.146 +12 50 59.89 V C57
2021-11-26 17:53:54 S 06 32 38.542 +12 50 58.85 V C57
2021-11-26 18:03:55 S 06 32 38.218 +12 51 00.79 V C57
2021-11-26 18:13:54 S 06 32 37.711 +12 50 59.32 V C57
2021-11-26 18:23:55 S 06 32 37.190 +12 51 00.61 V C57
2021-11-26 18:33:54 S 06 32 36.835 +12 51 01.19 V C57
2021-11-26 18:43:55 S 06 32 36.391 +12 51 00.00 V C57
2021-11-26 18:43:55 s 1 -10193.382 0 +380215.38 20.0 C57
2021-11-26 18:53:54 S 06 32 35.822 +12 51 00.07 V C57
2021-11-26 18:53:54 s 1 -10548.194 0 +380167.41 9730.0 C57
2021-11-26 19:03:54 S 06 32 35.441 +12 50 59.82 V C57
2021-11-26 19:03:54 s 1 -10902.973 0 +380118.44 9150.0 C57
2021-11-26 19:13:54 S 06 32 34.970 +12 51 00.18 V C57
2021-11-26 19:13:54 s 1 -11257.718 0 +380068.48 8280.0 C57
2021-11-26 19:23:54 S 06 32 34.481 +12 50 59.68 V C57
2021-11-26 19:23:54 s 1 -11612.428 0 +380017.52 7100.0 C57
2021-11-26 19:33:55 S 06 32 34.061 +12 50 59.50 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)