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
2021-11-13 07:53:55 S 06 43 40.694 +12 55 11.24 V C57
2021-11-13 08:03:55 S 06 43 40.414 +12 55 10.45 V C57
2021-11-13 08:13:55 S 06 43 40.154 +12 55 10.02 V C57
2021-11-13 08:23:55 S 06 43 39.862 +12 55 08.83 V C57
2021-11-13 08:33:55 S 06 43 39.571 +12 55 10.06 V C57
2021-11-13 09:43:55 S 06 43 37.853 +12 55 05.38 V C57
2021-11-13 09:53:55 S 06 43 37.526 +12 55 04.40 V C57
2021-11-13 10:03:55 S 06 43 37.195 +12 55 04.37 V C57
2021-11-13 10:13:55 S 06 43 36.989 +12 55 04.30 V C57
2021-11-13 10:23:55 S 06 43 36.720 +12 55 02.96 V C57
2021-11-13 10:33:55 S 06 43 36.466 +12 55 03.58 V C57
2021-11-13 10:43:55 S 06 43 36.194 +12 55 02.53 V C57
2021-11-13 11:03:55 S 06 43 35.611 +12 55 02.10 V C57
2021-11-13 12:13:55 S 06 43 33.862 +12 54 57.24 V C57
2021-11-13 12:23:55 S 06 43 33.528 +12 54 56.48 V C57
2021-11-13 12:33:55 S 06 43 33.206 +12 54 56.95 V C57
2021-11-13 12:43:55 S 06 43 32.914 +12 54 55.91 V C57
2021-11-13 12:53:55 S 06 43 32.731 +12 54 56.59 V C57
2021-11-13 13:03:55 S 06 43 32.482 +12 54 54.54 V C57
2021-11-13 13:13:55 S 06 43 32.184 +12 54 54.07 V C57
2021-11-13 14:43:55 S 06 43 29.801 +12 54 49.36 V C57
2021-11-13 14:53:55 S 06 43 29.558 +12 54 49.14 V C57
2021-11-13 15:13:55 S 06 43 29.086 +12 54 48.24 V C57
2021-11-13 15:13:55 s 1 -10614.769 0 +378495.80 1500.0 C57
2021-11-13 15:23:55 S 06 43 28.654 +12 54 47.12 V C57
2021-11-13 15:23:55 s 1 -10969.973 0 +378450.94 8420.0 C57
2021-11-13 15:33:55 S 06 43 28.502 +12 54 47.84 V C57
2021-11-13 15:33:55 s 1 -11325.149 0 +378405.09 5110.0 C57
2021-11-13 15:55:13 C 06 43 24.396 +12 53 41.50 V P07
2021-11-13 17:03:55 S 06 43 25.934 +12 54 42.26 V C57
2021-11-13 17:03:55 s 1 -14520.290 0 +377947.43 4060.0 C57
2021-11-13 17:08:47 C 06 43 22.512 +12 53 38.90 V P07
2021-11-13 17:13:55 S 06 43 25.781 +12 54 41.58 V C57
2021-11-13 17:13:55 s 1 -14875.129 0 +377891.58 8190.0 C57
2021-11-13 17:23:55 S 06 43 25.526 +12 54 41.80 V C57
2021-11-13 17:23:55 s 1 -15229.929 0 +377834.73 2030.0 C57
2021-11-13 17:33:55 S 06 43 25.193 +12 54 40.90 V C57
2021-11-13 17:33:55 s 1 -15584.688 0 +377776.89 5590.0 C57
2021-11-13 17:43:55 S 06 43 24.883 +12 54 40.07 V C57
2021-11-13 17:43:55 s 1 -15939.407 0 +377718.04 8870.0 C57
2021-11-13 17:53:55 S 06 43 24.634 +12 54 40.57 V C57
2021-11-13 17:53:55 s 1 -16294.084 0 +377658.19 1870.0 C57
2021-11-13 18:03:55 S 06 43 24.427 +12 54 40.39 V C57
2021-11-13 18:03:55 s 1 -16648.719 0 +377597.34 4570.0 C57
2021-11-13 18:05:47 C 06 43 21.031 +12 53 36.67 V P07
2021-11-13 18:06:25 C 06 43 21.007 +12 53 36.78 V P07
2021-11-13 19:10:16 C 06 43 19.346 +12 53 34.30 V P07
2021-11-13 19:33:55 S 06 43 21.943 +12 54 35.86 V C57
2021-11-13 19:33:55 s 1 -19838.346 0 +377004.64 5130.0 C57
2021-11-13 19:53:55 S 06 43 21.526 +12 54 34.56 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)