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
2021-09-30 08:43:58 s 1 +155061.30 3 +20168.095 4270.0 C57
2021-09-30 09:13:58 S 06 34 37.411 +14 38 12.62 V C57
2021-09-30 09:13:58 s 1 +156315.06 9 +23071.873 9440.0 C57
2021-09-30 09:23:58 S 06 34 37.752 +14 38 12.05 V C57
2021-09-30 09:23:58 s 1 +156723.16 6 +24038.379 2210.0 C57
2021-09-30 09:33:58 S 06 34 38.062 +14 38 10.82 V C57
2021-09-30 09:33:58 s 1 +157126.41 2 +25004.135 9050.0 C57
2021-09-30 09:43:58 S 06 34 38.724 +14 38 12.66 V C57
2021-09-30 09:43:58 s 1 +157524.84 2 +25969.121 70.0 C57
2021-09-30 10:43:58 S 06 34 41.309 +14 38 12.84 V C57
2021-09-30 10:43:58 s 1 +159816.30 1 +31741.666 680.0 C57
2021-09-30 10:53:58 S 06 34 41.501 +14 38 10.25 V C57
2021-09-30 10:53:58 s 1 +160182.01 6 +32700.676 4280.0 C57
2021-09-30 11:03:58 S 06 34 41.822 +14 38 07.91 V C57
2021-09-30 11:03:58 s 1 +160543.19 6 +33658.755 2990.0 C57
2021-09-30 11:23:58 S 06 34 42.655 +14 38 05.39 V C57
2021-09-30 11:23:58 s 1 +161252.08 3 +35572.049 6210.0 C57
2021-09-30 11:33:58 S 06 34 43.157 +14 38 06.47 V C57
2021-09-30 11:33:58 s 1 +161599.85 8 +36527.229 930.0 C57
2021-09-30 11:43:58 S 06 34 43.586 +14 38 04.70 V C57
2021-09-30 11:43:58 s 1 +161943.22 9 +37481.409 1210.0 C57
2021-09-30 11:53:58 S 06 34 43.918 +14 38 04.56 V C57
2021-09-30 11:53:58 s 1 +162282.23 2 +38434.572 7150.0 C57
2021-09-30 13:03:58 S 06 34 46.620 +14 37 56.89 V C57
2021-09-30 13:03:58 s 1 +164535.10 9 +45087.567 7240.0 C57
2021-09-30 13:23:58 S 06 34 47.326 +14 37 57.94 V C57
2021-09-30 13:23:58 s 1 +165141.34 4 +46974.767 3710.0 C57
2021-09-30 13:33:58 S 06 34 47.827 +14 37 55.38 V C57
2021-09-30 13:33:58 s 1 +165438.34 6 +47916.949 1970.0 C57
2021-09-30 13:43:58 S 06 34 48.235 +14 37 54.16 V C57
2021-09-30 13:43:58 s 1 +165731.31 9 +48857.958 7030.0 C57
2021-09-30 13:53:58 S 06 34 48.648 +14 37 51.60 V C57
2021-09-30 13:53:58 s 1 +166020.29 2 +49797.782 8980.0 C57
2021-09-30 14:03:58 S 06 34 48.994 +14 37 50.27 V C57
2021-09-30 14:03:58 s 1 +166305.29 4 +50736.409 7910.0 C57
2021-09-30 14:13:58 S 06 34 49.337 +14 37 50.66 V C57
2021-09-30 14:13:58 s 1 +166586.35 4 +51673.828 3930.0 C57
2021-09-30 14:23:58 S 06 34 49.834 +14 37 49.58 V C57
2021-09-30 14:23:58 s 1 +166863.50 2 +52610.028 7130.0 C57
2021-09-30 14:33:58 S 06 34 50.414 +14 37 44.47 V C57
2021-09-30 14:33:58 s 1 +167136.76 5 +53544.996 7600.0 C57
2021-09-30 14:43:58 S 06 34 50.738 +14 37 46.96 V C57
2021-09-30 14:43:58 s 1 +167406.17 1 +54478.723 5440.0 C57
2021-09-30 15:23:58 S 06 34 52.282 +14 37 44.72 V C57
2021-09-30 15:23:58 s 1 +168445.78 4 +58201.010 2300.0 C57
2021-09-30 15:33:58 S 06 34 52.790 +14 37 43.25 V C57
2021-09-30 15:33:58 s 1 +168696.32 1 +59128.377 8340.0 C57
2021-09-30 15:43:58 S 06 34 52.848 +14 37 42.64 V C57
2021-09-30 15:43:58 s 1 +168943.16 5 +60054.444 2280.0 C57
2021-09-30 15:53:58 S 06 34 53.434 +14 37 40.33 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)