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 09:43:58 S 06 37 58.944 +14 27 14.04 V C57
2021-10-04 09:43:58 s 1 +71303.381 0 +352436.13 3190.0 C57
2021-10-04 11:03:58 S 06 38 01.262 +14 27 03.35 V C57
2021-10-04 11:03:58 s 1 +68451.961 0 +354035.23 9170.0 C57
2021-10-04 11:13:58 S 06 38 01.574 +14 27 00.54 V C57
2021-10-04 11:13:58 s 1 +68094.631 0 +354230.21 8410.0 C57
2021-10-04 11:23:58 S 06 38 01.798 +14 26 59.35 V C57
2021-10-04 11:23:58 s 1 +67737.105 0 +354424.11 7040.0 C57
2021-10-04 11:33:58 S 06 38 02.189 +14 26 59.60 V C57
2021-10-04 11:33:58 s 1 +67379.384 0 +354616.92 5080.0 C57
2021-10-04 13:23:58 S 06 38 05.482 +14 26 46.03 V C57
2021-10-04 13:23:58 s 1 +63433.529 0 +356667.52 8330.0 C57
2021-10-04 13:33:58 S 06 38 05.832 +14 26 43.40 V C57
2021-10-04 13:33:58 s 1 +63073.571 0 +356847.32 9560.0 C57
2021-10-04 13:43:58 S 06 38 06.221 +14 26 42.29 V C57
2021-10-04 13:43:58 s 1 +62713.434 0 +357026.03 250.0 C57
2021-10-04 13:53:58 S 06 38 06.487 +14 26 41.32 V C57
2021-10-04 13:53:58 s 1 +62353.121 0 +357203.66 410.0 C57
2021-10-04 14:03:58 S 06 38 06.881 +14 26 39.55 V C57
2021-10-04 14:03:58 s 1 +61992.632 0 +357380.21 30.0 C57
2021-10-04 14:12:04 C 06 38 00.95 +14 25 20.9 V T05
2021-10-04 14:13:58 S 06 38 07.277 +14 26 39.44 V C57
2021-10-04 14:13:58 s 1 +61631.968 0 +357555.68 9120.0 C57
2021-10-04 14:16:42 C 06 38 01.10 +14 25 20.4 V T05
2021-10-04 14:23:58 S 06 38 07.478 +14 26 38.72 V C57
2021-10-04 14:23:58 s 1 +61271.131 0 +357730.07 7690.0 C57
2021-10-04 14:24:02 C 06 38 01.33 +14 25 19.5 V T05
2021-10-04 14:56:39 C 06 38 02.35 +14 25 15.4 V T05
2021-10-04 15:33:58 S 06 38 09.617 +14 26 28.97 V C57
2021-10-04 15:33:58 s 1 +58740.523 0 +358920.57 3310.0 C57
2021-10-04 15:43:58 S 06 38 09.991 +14 26 30.08 V C57
2021-10-04 15:43:58 s 1 +58378.344 0 +359086.33 7820.0 C57
2021-10-04 15:53:58 S 06 38 10.176 +14 26 28.93 V C57
2021-10-04 15:53:58 s 1 +58016.003 0 +359251.01 1850.0 C57
2021-10-04 16:03:58 S 06 38 10.438 +14 26 25.55 V C57
2021-10-04 16:03:58 s 1 +57653.501 0 +359414.62 5390.0 C57
2021-10-04 16:13:58 S 06 38 10.790 +14 26 25.48 V C57
2021-10-04 16:13:58 s 1 +57290.839 0 +359577.15 8450.0 C57
2021-10-04 16:23:58 S 06 38 11.138 +14 26 22.70 V C57
2021-10-04 16:23:58 s 1 +56928.019 0 +359738.60 1030.0 C57
2021-10-04 16:33:58 S 06 38 11.438 +14 26 21.88 V C57
2021-10-04 16:33:58 s 1 +56565.041 0 +359898.98 3150.0 C57
2021-10-04 16:43:58 S 06 38 11.798 +14 26 19.82 V C57
2021-10-04 16:43:58 s 1 +56201.908 0 +360058.29 4790.0 C57
2021-10-04 17:53:58 S 06 38 13.910 +14 26 11.94 V C57
2021-10-04 17:53:58 s 1 +53655.704 0 +361143.36 3510.0 C57
2021-10-04 18:03:58 S 06 38 14.117 +14 26 09.96 V C57
2021-10-04 18:03:58 s 1 +53291.365 0 +361294.08 1540.0 C57
2021-10-04 18:13:58 S 06 38 14.458 +14 26 09.46 V C57
2021-10-04 18:13:58 s 1 +52926.881 0 +361443.73 9150.0 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)