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
2019-10-31 11:19:39 C 09 27 35.99 +12 42 53.2 V 703
2019-11-02 12:55:28 C 09 29 32.71 +12 35 21.5 V T08
2019-11-02 13:07:38 C 09 29 33.16 +12 35 19.8 V T08
2019-11-02 13:13:30 C 09 29 33.39 +12 35 18.9 V T08
2019-11-02 13:27:59 C 09 29 33.94 +12 35 16.8 V T08
2019-11-04 12:12:59 C 09 31 20.45 +12 28 25.5 V T05
2019-11-04 12:20:54 C 09 31 20.76 +12 28 24.3 V T05
2019-11-04 12:36:02 C 09 31 21.30 +12 28 22.1 V T05
2019-11-04 12:40:44 C 09 31 21.49 +12 28 21.6 V T05
2019-11-08 14:13:33 C 09 34 52.415 +12 14 55.66 U F51
2019-11-08 14:31:31 C 09 34 53.026 +12 14 53.30 U F51
2019-11-08 14:49:28 C 09 34 53.637 +12 14 50.98 U F51
2019-11-08 15:07:32 C 09 34 54.246 +12 14 48.64 U F51
2019-11-10 12:21:21 C 09 36 26.82 +12 09 00.3 V T08
2019-11-10 12:26:00 C 09 36 26.98 +12 08 59.9 V T08
2019-11-10 12:34:02 C 09 36 27.24 +12 08 59.1 V T08
2019-11-10 12:51:53 C 09 36 27.83 +12 08 56.8 V T08
2019-11-11 14:31:08 C 09 37 18.64 +12 05 47.4 V T05
2019-11-11 14:36:56 C 09 37 18.80 +12 05 46.6 V T05
2019-11-11 14:45:40 C 09 37 19.10 +12 05 45.6 V T05
2019-11-11 14:59:52 C 09 37 19.53 +12 05 43.9 V T05
2019-11-12 11:49:45 C 09 38 00.13 +12 03 14.1 V T05
2019-11-12 11:55:07 C 09 38 00.29 +12 03 13.6 V T05
2019-11-12 12:03:06 C 09 38 00.53 +12 03 12.5 V T05
2019-11-12 12:17:20 C 09 38 01.00 +12 03 11.1 V T05
2019-11-14 13:33:46 C 09 39 33.52 +11 57 33.6 V T08
2019-11-14 13:39:29 C 09 39 33.70 +11 57 33.0 V T08
2019-11-14 13:48:04 C 09 39 33.96 +11 57 32.0 V T08
2019-11-14 14:06:47 C 09 39 34.51 +11 57 30.0 V T08
2019-11-17 09:45:06 C 09 41 34.26 +11 50 23.8 u H21
2019-11-17 09:47:04 C 09 41 34.31 +11 50 23.7 u H21
2019-11-17 09:49:01 C 09 41 34.37 +11 50 23.4 u H21
2019-11-17 09:50:59 C 09 41 34.42 +11 50 23.4 u H21
2019-11-17 09:52:57 C 09 41 34.47 +11 50 23.2 u H21
2019-11-17 09:54:54 C 09 41 34.54 +11 50 22.8 u H21
2019-11-17 09:56:52 C 09 41 34.59 +11 50 22.8 u H21
2019-11-17 09:58:50 C 09 41 34.63 +11 50 22.7 u H21
2019-11-17 10:00:35 C 09 41 34.68 +11 50 22.5 u H21
2019-11-20 13:22:02 C 09 43 37.81 +11 43 26.4 V T05
2019-11-20 13:26:06 C 09 43 37.91 +11 43 25.9 V T05
2019-11-20 13:36:14 C 09 43 38.17 +11 43 25.1 V T05
2019-11-20 13:51:43 C 09 43 38.56 +11 43 24.1 V T05
2019-11-28 11:41:17 C 09 47 55.91 +11 30 51.0 V T05
2019-11-28 11:55:24 C 09 47 56.16 +11 30 50.5 V T05
2019-11-28 11:59:25 C 09 47 56.21 +11 30 50.3 V T05
2019-11-28 12:21:23 C 09 47 56.64 +11 30 49.2 V T05
2019-12-03 12:39:31 C 09 49 56.990 +11 27 03.25 U F51
2019-12-03 12:56:07 C 09 49 57.216 +11 27 03.02 U F51
2019-12-03 13:12:44 C 09 49 57.435 +11 27 02.79 U F51
2019-12-03 13:29:20 C 09 49 57.658 +11 27 02.53 U F51
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)