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
2018-06-18 21:46:35 C 14 36 04.26 +12 27 43.2 U Z64
2018-06-19 00:19:15 C 14 36 03.54 +12 26 09.7 q C23
2018-06-19 00:22:07 C 14 36 03.53 +12 26 08.2 q C23
2018-06-19 00:23:16 C 14 36 03.48 +12 26 11.3 U Z71
2018-06-19 00:25:00 C 14 36 03.52 +12 26 06.3 q C23
2018-06-19 00:32:19 C 14 36 03.46 +12 26 06.5 U Z71
2018-06-19 00:40:22 C 14 36 03.43 +12 26 01.5 U Z71
2018-06-19 09:06:23 C 14 36 04.18 +12 21 13.9 U T08
2018-06-19 09:21:39 C 14 36 04.10 +12 21 04.6 U T08
2018-06-19 09:37:29 C 14 36 04.03 +12 20 55.1 U T08
2018-06-19 09:52:28 C 14 36 03.97 +12 20 46.0 U T08
2018-06-19 21:50:53 C 14 36 06.12 +12 13 22.6 U B50
2018-06-19 21:57:48 C 14 36 06.07 +12 13 18.3 U B50
2018-06-19 21:58:58 C 14 36 06.06 +12 13 17.6 U B50
2018-06-19 22:00:07 C 14 36 06.07 +12 13 16.9 U B50
2018-06-20 09:09:06 C 14 36 07.99 +12 06 35.7 U T08
2018-06-20 09:25:06 C 14 36 07.96 +12 06 25.6 U T08
2018-06-20 09:41:36 C 14 36 07.93 +12 06 15.0 U T08
2018-06-20 09:57:41 C 14 36 07.91 +12 06 04.8 U T08
2018-06-20 20:53:56 C 14 36 11.71 +11 59 00.5 q 160
2018-06-20 20:55:30 C 14 36 11.71 +11 58 59.4 q 160
2018-06-20 20:57:03 C 14 36 11.70 +11 58 58.4 q 160
2018-06-20 21:55:06 C 14 36 11.90 +11 58 18.9 q C23
2018-06-20 22:00:14 C 14 36 11.91 +11 58 15.6 q C23
2018-06-20 22:05:37 C 14 36 11.91 +11 58 12.2 q C23
2018-06-20 22:11:15 C 14 36 11.81 +11 58 08.4 13.2 U K46
2018-06-20 22:18:46 C 14 36 11.82 +11 58 03.5 12.8 U K46
2018-06-20 22:34:45 C 14 36 11.84 +11 57 53.1 12.3 U K46
2018-06-20 22:51:46 C 14 36 11.87 +11 57 42.0 12.1 U K46
2018-06-20 22:57:45 C 14 36 11.88 +11 57 38.1 12.0 U K46
2018-06-21 03:58:29 C 14 36 14.31 +11 54 30.9 u 719
2018-06-21 04:51:36 C 14 36 14.34 +11 53 56.0 u 719
2018-06-21 08:51:50 C 14 36 15.42 +11 51 24.7 U T05
2018-06-21 09:04:52 C 14 36 15.43 +11 51 15.8 U T05
2018-06-21 09:07:03 C 14 36 15.42 +11 51 14.7 U T05
2018-06-21 09:20:01 C 14 36 15.43 +11 51 06.0 U T05
2018-06-21 09:21:33 C 14 36 15.44 +11 51 04.8 U T05
2018-06-21 09:36:43 C 14 36 15.44 +11 50 54.9 U T05
2018-06-22 09:18:25 C 14 36 26.49 +11 34 59.6 U T05
2018-06-22 09:34:24 C 14 36 26.54 +11 34 48.4 U T05
2018-06-22 09:50:36 C 14 36 26.59 +11 34 37.0 U T05
2018-06-22 10:06:21 C 14 36 26.66 +11 34 26.1 U T05
2018-06-23 05:40:17 C 14 36 38.97 +11 20 38.3 u 719
2018-06-23 05:59:47 C 14 36 39.10 +11 20 24.4 u 719
2018-06-23 08:52:43 C 14 36 41.03 +11 18 26.5 U T08
2018-06-23 09:07:58 C 14 36 41.11 +11 18 15.4 U T08
2018-06-23 09:23:17 C 14 36 41.19 +11 18 04.2 U T08
2018-06-23 09:39:33 C 14 36 41.29 +11 17 52.4 U T08
2018-06-23 20:45:18 C 14 36 50.56 +11 09 45.0 12.3 q J43
2018-06-23 20:57:52 C 14 36 50.64 +11 09 35.8 12.4 q J43
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)