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
2021-10-01 06:03:58 s 1 +178785.42 8 +134234.26 4560.0 C57
2021-10-01 06:13:58 S 06 35 25.870 +14 36 11.95 V C57
2021-10-01 06:13:58 s 1 +178790.82 4 +135029.77 260.0 C57
2021-10-01 06:23:58 S 06 35 26.184 +14 36 10.33 V C57
2021-10-01 06:23:58 s 1 +178794.15 5 +135823.70 9240.0 C57
2021-10-01 06:33:58 S 06 35 26.647 +14 36 10.91 V C57
2021-10-01 06:33:58 s 1 +178795.43 5 +136616.06 1540.0 C57
2021-10-01 06:43:58 S 06 35 26.940 +14 36 07.20 V C57
2021-10-01 06:43:58 s 1 +178794.67 4 +137406.86 7200.0 C57
2021-10-01 06:53:58 S 06 35 27.329 +14 36 06.16 V C57
2021-10-01 06:53:58 s 1 +178791.88 6 +138196.08 6270.0 C57
2021-10-01 07:03:58 S 06 35 27.792 +14 36 05.58 V C57
2021-10-01 07:03:58 s 1 +178787.08 3 +138983.74 8790.0 C57
2021-10-01 07:13:58 S 06 35 28.255 +14 36 04.39 V C57
2021-10-01 07:13:58 s 1 +178780.27 7 +139769.83 4790.0 C57
2021-10-01 08:13:58 S 06 35 30.295 +14 35 59.39 V C57
2021-10-01 08:13:58 s 1 +178698.03 0 +144453.46 6090.0 C57
2021-10-01 08:23:58 S 06 35 30.766 +14 35 56.40 V C57
2021-10-01 08:23:58 s 1 +178677.52 9 +145228.58 7550.0 C57
2021-10-01 08:33:58 S 06 35 31.090 +14 35 57.08 V C57
2021-10-01 08:33:58 s 1 +178655.11 8 +146002.14 2800.0 C57
2021-10-01 08:43:58 S 06 35 31.418 +14 35 54.71 V C57
2021-10-01 08:43:58 s 1 +178630.80 7 +146774.14 1880.0 C57
2021-10-01 08:53:58 S 06 35 31.807 +14 35 54.31 V C57
2021-10-01 08:53:58 s 1 +178604.60 9 +147544.57 4810.0 C57
2021-10-01 09:03:58 S 06 35 32.237 +14 35 52.94 V C57
2021-10-01 09:03:58 s 1 +178576.53 3 +148313.45 1650.0 C57
2021-10-01 09:13:58 S 06 35 32.376 +14 35 50.32 V C57
2021-10-01 09:13:58 s 1 +178546.59 1 +149080.76 2420.0 C57
2021-10-01 09:23:58 S 06 35 32.834 +14 35 51.86 V C57
2021-10-01 09:23:58 s 1 +178514.79 4 +149846.51 7160.0 C57
2021-10-01 09:33:58 S 06 35 33.163 +14 35 49.67 V C57
2021-10-01 09:33:58 s 1 +178481.15 2 +150610.70 5900.0 C57
2021-10-01 09:43:58 S 06 35 33.595 +14 35 46.86 V C57
2021-10-01 09:43:58 s 1 +178445.67 6 +151373.33 8690.0 C57
2021-10-01 10:53:58 S 06 35 36.175 +14 35 41.10 V C57
2021-10-01 10:53:58 s 1 +178146.87 9 +156668.16 4190.0 C57
2021-10-01 11:03:58 S 06 35 36.516 +14 35 39.26 V C57
2021-10-01 11:03:58 s 1 +178097.10 7 +157418.35 530.0 C57
2021-10-01 11:13:58 S 06 35 36.816 +14 35 36.60 V C57
2021-10-01 11:13:58 s 1 +178045.59 5 +158166.99 1220.0 C57
2021-10-01 11:23:58 S 06 35 37.224 +14 35 37.79 V C57
2021-10-01 11:23:58 s 1 +177992.35 1 +158914.07 6280.0 C57
2021-10-01 11:33:58 S 06 35 37.603 +14 35 37.61 V C57
2021-10-01 11:33:58 s 1 +177937.38 5 +159659.61 5750.0 C57
2021-10-01 11:43:58 S 06 35 38.076 +14 35 35.27 V C57
2021-10-01 11:43:58 s 1 +177880.70 8 +160403.60 9660.0 C57
2021-10-01 11:53:58 S 06 35 38.366 +14 35 36.02 V C57
2021-10-01 11:53:58 s 1 +177822.32 9 +161146.04 8040.0 C57
2021-10-01 12:03:58 S 06 35 38.659 +14 35 35.27 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)