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
2021-10-04 18:23:58 S 06 38 14.921 +14 26 07.15 V C57
2021-10-04 18:23:58 s 1 +52562.253 0 +361592.31 6320.0 C57
2021-10-04 18:33:58 S 06 38 15.187 +14 26 07.62 V C57
2021-10-04 18:33:58 s 1 +52197.482 0 +361739.81 3070.0 C57
2021-10-04 18:43:58 S 06 38 15.468 +14 26 06.79 V C57
2021-10-04 18:43:58 s 1 +51832.569 0 +361886.25 9400.0 C57
2021-10-04 18:53:58 S 06 38 15.607 +14 26 03.91 V C57
2021-10-04 18:53:58 s 1 +51467.516 0 +362031.61 5310.0 C57
2021-10-04 19:03:58 S 06 38 16.075 +14 26 02.26 V C57
2021-10-04 19:03:58 s 1 +51102.324 0 +362175.91 810.0 C57
2021-10-04 19:13:58 S 06 38 16.349 +14 26 01.39 V C57
2021-10-04 19:13:58 s 1 +50736.994 0 +362319.14 5900.0 C57
2021-10-04 20:33:58 S 06 38 18.888 +14 25 50.56 V C57
2021-10-04 20:33:58 s 1 +47809.520 0 +363426.49 2310.0 C57
2021-10-04 20:43:58 S 06 38 19.099 +14 25 50.66 V C57
2021-10-04 20:43:58 s 1 +47442.999 0 +363560.11 3880.0 C57
2021-10-04 20:53:58 S 06 38 19.380 +14 25 47.86 V C57
2021-10-04 20:53:58 s 1 +47076.352 0 +363692.66 5090.0 C57
2021-10-04 21:03:58 S 06 38 19.778 +14 25 47.75 V C57
2021-10-04 21:03:58 s 1 +46709.580 0 +363824.14 5920.0 C57
2021-10-04 21:13:58 S 06 38 19.932 +14 25 46.45 V C57
2021-10-04 21:13:58 s 1 +46342.684 0 +363954.56 6390.0 C57
2021-10-04 21:23:58 S 06 38 20.287 +14 25 44.47 V C57
2021-10-04 21:23:58 s 1 +45975.665 0 +364083.91 6500.0 C57
2021-10-04 23:23:58 S 06 38 23.616 +14 25 26.08 V C57
2021-10-04 23:23:58 s 1 +41562.268 0 +365553.18 1140.0 C57
2021-10-04 23:33:58 S 06 38 24.230 +14 25 28.38 V C57
2021-10-04 23:33:58 s 1 +41193.755 0 +365668.72 6920.0 C57
2021-10-05 01:33:58 S 06 38 27.768 +14 25 13.55 V C57
2021-10-05 01:33:58 s 1 +36763.592 0 +366972.42 3310.0 C57
2021-10-05 01:43:58 S 06 38 28.330 +14 25 11.14 V C57
2021-10-05 01:43:58 s 1 +36393.778 0 +367074.18 5370.0 C57
2021-10-05 01:53:58 S 06 38 28.505 +14 25 10.13 V C57
2021-10-05 01:53:58 s 1 +36023.872 0 +367174.88 7180.0 C57
2021-10-05 02:03:58 S 06 38 28.822 +14 25 06.78 V C57
2021-10-05 02:03:58 s 1 +35653.874 0 +367274.52 8730.0 C57
2021-10-05 02:13:58 S 06 38 29.083 +14 25 07.64 V C57
2021-10-05 02:13:58 s 1 +35283.787 0 +367373.11 40.0 C57
2021-10-05 02:23:58 S 06 38 29.609 +14 25 06.71 V C57
2021-10-05 02:23:58 s 1 +34913.610 0 +367470.63 1090.0 C57
2021-10-05 03:43:58 S 06 38 31.829 +14 24 54.11 V C57
2021-10-05 03:43:58 s 1 +31949.128 0 +368212.84 1000.0 C57
2021-10-05 03:53:58 S 06 38 32.131 +14 24 54.47 V C57
2021-10-05 03:53:58 s 1 +31578.201 0 +368300.86 9980.0 C57
2021-10-05 04:03:58 S 06 38 32.167 +14 24 52.99 V C57
2021-10-05 04:03:58 s 1 +31207.196 0 +368387.84 8740.0 C57
2021-10-05 04:13:58 S 06 38 32.633 +14 24 50.62 V C57
2021-10-05 04:13:58 s 1 +30836.113 0 +368473.75 7300.0 C57
2021-10-05 04:23:58 S 06 38 33.002 +14 24 49.75 V C57
2021-10-05 04:23:58 s 1 +30464.956 0 +368558.61 5650.0 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)