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 15:53:58 S 06 38 53.484 +14 23 21.23 V C57
2021-10-05 16:03:58 S 06 38 53.911 +14 23 20.76 V C57
2021-10-05 16:13:58 S 06 38 54.163 +14 23 17.66 V C57
2021-10-05 16:23:57 S 06 38 54.454 +14 23 17.77 V C57
2021-10-05 16:33:58 S 06 38 54.665 +14 23 14.86 V C57
2021-10-05 16:43:57 S 06 38 54.929 +14 23 15.40 V C57
2021-10-05 17:53:57 S 06 38 57.113 +14 23 06.86 V C57
2021-10-05 18:03:58 S 06 38 57.377 +14 23 04.67 V C57
2021-10-05 18:13:57 S 06 38 57.578 +14 23 02.65 V C57
2021-10-05 18:23:58 S 06 38 57.934 +14 23 01.72 V C57
2021-10-05 18:33:58 S 06 38 58.169 +14 23 00.67 V C57
2021-10-05 18:43:58 S 06 38 58.452 +14 22 58.98 V C57
2021-10-05 18:53:58 S 06 38 58.790 +14 22 57.61 V C57
2021-10-05 19:03:57 S 06 38 59.074 +14 22 56.89 V C57
2021-10-05 20:23:58 S 06 39 01.373 +14 22 46.99 V C57
2021-10-05 20:33:57 S 06 39 01.798 +14 22 45.30 V C57
2021-10-05 20:43:58 S 06 39 02.026 +14 22 43.64 V C57
2021-10-05 20:53:57 S 06 39 02.191 +14 22 40.48 V C57
2021-10-05 21:03:58 S 06 39 02.530 +14 22 38.86 V C57
2021-10-05 21:13:57 S 06 39 02.902 +14 22 37.70 V C57
2021-10-05 21:23:58 S 06 39 03.115 +14 22 37.92 V C57
2021-10-05 22:43:57 S 06 39 05.566 +14 22 27.73 V C57
2021-10-05 22:43:57 s 1 -10580.998 0 +371488.74 4170.0 C57
2021-10-05 22:53:58 S 06 39 05.825 +14 22 26.58 V C57
2021-10-05 22:53:58 s 1 -10953.948 0 +371457.31 6760.0 C57
2021-10-05 23:03:58 S 06 39 06.122 +14 22 25.46 V C57
2021-10-05 23:03:58 s 1 -11326.855 0 +371424.84 9180.0 C57
2021-10-05 23:13:58 S 06 39 06.358 +14 22 23.02 V C57
2021-10-05 23:13:58 s 1 -11699.719 0 +371391.32 1400.0 C57
2021-10-05 23:23:58 S 06 39 06.744 +14 22 21.97 V C57
2021-10-05 23:23:58 s 1 -12072.538 0 +371356.75 3420.0 C57
2021-10-05 23:33:57 S 06 39 06.929 +14 22 19.85 V C57
2021-10-05 23:33:57 s 1 -12445.311 0 +371321.14 5260.0 C57
2021-10-05 23:43:58 S 06 39 07.344 +14 22 19.63 V C57
2021-10-05 23:43:58 s 1 -12818.038 0 +371284.49 6890.0 C57
2021-10-05 23:53:57 S 06 39 07.474 +14 22 16.90 V C57
2021-10-05 23:53:57 s 1 -13190.716 0 +371246.79 8320.0 C57
2021-10-06 01:13:58 S 06 39 09.919 +14 22 08.36 V C57
2021-10-06 01:13:58 s 1 -16170.301 0 +370907.50 2030.0 C57
2021-10-06 01:23:57 S 06 39 10.224 +14 22 06.10 V C57
2021-10-06 01:23:57 s 1 -16542.503 0 +370860.38 1470.0 C57
2021-10-06 01:33:58 S 06 39 10.385 +14 22 04.76 V C57
2021-10-06 01:33:58 s 1 -16914.646 0 +370812.21 680.0 C57
2021-10-06 01:43:57 S 06 39 10.800 +14 22 05.05 V C57
2021-10-06 01:43:57 s 1 -17286.730 0 +370763.00 9650.0 C57
2021-10-06 01:53:58 S 06 39 11.033 +14 22 03.25 V C57
2021-10-06 01:53:58 s 1 -17658.754 0 +370712.74 8370.0 C57
2021-10-06 02:03:58 S 06 39 11.256 +14 22 02.39 V C57
2021-10-06 02:03:58 s 1 -18030.716 0 +370661.43 6840.0 C57
2021-10-06 02:13:57 S 06 39 11.657 +14 21 58.57 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)