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
2025-03-30 06:36:38 C 08 01 23.016 +21 51 02.88 V T05
2025-03-30 06:41:35 C 08 01 23.052 +21 51 03.20 V T05
2025-03-30 06:47:10 C 08 01 23.086 +21 51 03.38 V T05
2025-03-31 06:25:55 C 08 01 35.611 +21 52 06.35 V T08
2025-03-31 06:30:41 C 08 01 35.650 +21 52 06.60 V T08
2025-03-31 06:36:15 C 08 01 35.698 +21 52 06.64 V T08
2025-03-31 20:21:04 C 08 01 43.759 +21 52 37.67 Z C23
2025-03-31 20:33:23 C 08 01 43.891 +21 52 38.53 Z C23
2025-03-31 21:03:28 C 08 01 44.141 +21 52 39.40 Z C23
2025-04-01 06:21:59 C 08 01 50.009 +21 53 03.26 V T08
2025-04-01 06:37:46 C 08 01 50.167 +21 53 03.84 V T08
2025-04-01 06:42:26 C 08 01 50.208 +21 53 04.06 V T08
2025-04-02 06:15:38 C 08 02 06.122 +21 53 53.99 V T05
2025-04-02 06:19:05 C 08 02 06.228 +21 53 54.20 V T08
2025-04-02 06:25:29 C 08 02 06.214 +21 53 54.31 V T08
2025-04-02 06:31:51 C 08 02 06.295 +21 53 54.78 V T08
2025-04-03 06:29:26 C 08 02 24.170 +21 54 38.92 V T05
2025-04-03 06:36:39 C 08 02 24.262 +21 54 39.06 V T05
2025-04-03 06:45:37 C 08 02 24.355 +21 54 39.56 V T05
2025-04-04 06:02:23 C 08 02 43.404 +21 55 16.57 V T05
2025-04-04 06:07:39 C 08 02 43.474 +21 55 17.44 V T05
2025-04-04 06:17:03 C 08 02 43.634 +21 55 16.75 V T05
2025-04-04 06:33:39 C 08 02 43.814 +21 55 17.26 V T05
2025-04-04 19:30:57 C 08 02 55.128 +21 55 33.35 Z C23
2025-04-04 20:38:53 C 08 02 56.081 +21 55 34.97 Z C23
2025-04-04 21:12:34 C 08 02 56.551 +21 55 34.82 Z C23
2025-04-07 20:32:55 C 08 04 07.488 +21 56 42.14 X L63
2025-04-07 20:52:28 C 08 04 07.826 +21 56 42.25 X L63
2025-04-07 21:10:28 C 08 04 08.095 +21 56 42.22 X L63
2025-04-09 07:00:12 C 08 04 46.754 +21 56 56.87 V T05
2025-04-09 07:04:46 C 08 04 46.838 +21 56 56.83 V T05
2025-04-09 07:12:14 C 08 04 46.970 +21 56 57.12 V T05
2025-04-09 07:26:21 C 08 04 47.244 +21 56 56.87 V T05
2025-04-10 20:48:06 C 08 05 33.490 +21 56 54.89 Z C23
2025-04-10 21:40:25 C 08 05 34.603 +21 56 54.60 Z C23
2025-04-10 22:24:04 C 08 05 35.554 +21 56 53.88 Z C23
2025-04-11 01:18:22 C 08 05 39.374 +21 56 54.31 q X04
2025-04-11 01:50:17 C 08 05 39.955 +21 56 54.42 q X04
2025-04-11 02:21:36 C 08 05 40.613 +21 56 53.77 q X04
2025-04-11 08:01:54 C 08 05 48.019 +21 56 54.46 V T08
2025-04-11 08:07:58 C 08 05 48.144 +21 56 54.35 V T08
2025-04-11 08:15:22 C 08 05 48.319 +21 56 54.28 V T08
2025-04-11 08:31:24 C 08 05 48.595 +21 56 53.92 V T08
2025-04-14 01:00:38 C 08 07 18.948 +21 56 16.91 V W68
2025-04-14 01:19:17 C 08 07 19.385 +21 56 16.98 V W68
2025-04-14 01:23:54 C 08 07 19.493 +21 56 16.73 V W68
2025-04-14 01:31:46 C 08 07 19.690 +21 56 16.37 V W68
2025-04-14 06:25:43 C 08 07 26.981 +21 56 08.77 V T08
2025-04-14 06:29:45 C 08 07 27.084 +21 56 08.63 V T08
2025-04-14 06:37:53 C 08 07 27.278 +21 56 08.59 V T08
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)