826936 (1998 HH49)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5036549492 ± 9.30e-09
Semi-major axis (a)1.5579522826 AU ± 1.39e-09
Inclination (i)8.42869296° ± 2.03e-06
Long. of Asc. Node (Ω)23.44698206° ± 6.28e-07
Arg. of Perihelion (ω)288.23762386° ± 1.98e-06
Mean Anomaly (M)52.54681269° ± 5.61e-07
Mean Motion (n)0.5068518645°/day ± 6.78e-10
Perihelion dist (q)0.77328190 AU ± 1.45e-08
Aphelion dist (Q)2.34262266 AU ± 1.46e-08
Orbital Period1.94460424 yr ± 2.60e-09
Physical Parameters
H (abs. magnitude)21.37
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.156″
Uncertainty0
Orbit TypeApollo
MOID0.001995 AU
Observations Used201
Radar Obs Used10
Oppositions12
Arc Total1998-2025
First Observation Used1998-04-28
Last Observation Used2025-04-26
Observations (281)
Date Type RA Dec Mag Band Observatory
1998-04-28 03:18:30 c 12 18 41.09 -06 44 21.4 i 691
1998-04-28 03:49:07 c 12 18 35.62 -06 44 25.7 i 691
1998-04-28 04:19:23 c 12 18 30.28 -06 44 25.1 i 691
1998-04-29 04:38:58 c 12 14 18.47 -06 46 31.7 i 691
1998-04-29 04:49:23 c 12 14 16.54 -06 46 32.2 i 691
1998-04-29 04:59:41 c 12 14 14.70 -06 46 33.3 i 691
1998-04-30 06:57:11 C 12 09 41.66 -06 49 00.1 i 691
1998-04-30 07:10:52 C 12 09 38.95 -06 49 02.1 i 691
1998-05-03 05:14:53 c 11 57 06.78 -06 56 46.4 i 691
1998-05-03 05:37:05 c 11 57 02.65 -06 56 50.0 i 691
1998-05-03 05:53:14 c 11 56 59.50 -06 56 51.8 i 691
1998-05-29 06:59:32 C 09 56 45.72 -09 26 30.5 568
1998-05-29 07:59:54 C 09 56 33.07 -09 26 47.5 568
1998-05-30 07:21:40 C 09 51 47.11 -09 33 51.2 568
1998-10-16 12:47:51 C 07 01 02.59 +30 51 24.9 b 568
1998-10-16 13:04:51 C 07 01 02.70 +30 51 34.1 b 568
1998-10-16 13:40:28 C 07 01 02.93 +30 51 52.8 b 568
2000-12-23 11:19:38 C 06 19 29.75 +39 22 14.8 568
2000-12-23 11:28:46 C 06 19 28.77 +39 22 14.9 568
2000-12-24 10:34:39 C 06 17 07.12 +39 22 39.7 568
2000-12-24 10:45:21 C 06 17 05.99 +39 22 39.8 568
2021-12-01 04:16:59 C 22 48 42.81 -01 36 43.4 o 291
2021-12-01 04:39:52 C 22 48 47.66 -01 36 00.7 o 291
2023-10-17 01:37:04 B 21 01 30.47 -32 23 53.7 q X33
2023-10-17 01:38:18 B 21 01 42.50 -32 21 53.6 q X33
2023-10-17 01:39:26 B 21 01 53.51 -32 20 03.2 q X33
2023-10-17 18:03:04 C 22 54 45.22 -08 04 03.4 X G02
2023-10-17 18:05:54 C 22 54 57.16 -08 00 45.3 X G02
2023-10-17 18:08:41 C 22 55 08.99 -07 57 28.6 X G02
2023-10-17 19:09:37 B 22 59 11.47 -06 48 03.1 X L99
2023-10-17 19:09:43 B 22 59 11.94 -06 47 55.7 X L99
2023-10-17 19:09:49 B 22 59 12.34 -06 47 48.9 X L99
2023-10-17 19:09:55 B 22 59 12.77 -06 47 42.7 X L99
2023-10-17 19:10:01 B 22 59 13.17 -06 47 35.4 X L99
2023-10-17 19:10:08 B 22 59 13.59 -06 47 27.9 X L99
2023-10-17 19:10:14 B 22 59 14.01 -06 47 21.1 X L99
2023-10-17 19:10:20 B 22 59 14.44 -06 47 14.5 X L99
2023-10-17 19:10:26 B 22 59 14.84 -06 47 07.7 X L99
2023-10-17 19:10:32 B 22 59 15.26 -06 47 01.0 X L99
2023-10-17 19:55:54 B 23 02 25.50 -05 57 23.9 q M07
2023-10-17 20:53:33 B 23 06 03.11 -04 56 11.5 q M07
2023-10-17 22:23:49 B 23 11 24.29 -03 25 23.9 q M07
2023-10-18 01:31:55 C 23 22 08.467 -00 18 36.09 V W85
2023-10-18 04:00:44 C 23 28 56.489 +01 39 40.85 V W87
2023-10-18 04:01:20 C 23 28 58.061 +01 40 07.93 V W87
2023-10-18 04:01:57 C 23 28 59.659 +01 40 35.54 V W87
2023-10-18 04:02:34 C 23 29 01.257 +01 41 03.26 V W87
2023-10-18 04:03:11 C 23 29 02.859 +01 41 30.97 V W87
2023-10-18 04:03:48 C 23 29 04.470 +01 41 58.65 V W87
2023-10-18 04:04:25 C 23 29 06.069 +01 42 26.35 V W87
Radar Observations (10)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2023-10-17 03:40:00 -116896.739 0.2 Hz 8560 -14 -14
2023-10-17 03:50:00 7896510.276 10 us 8560 -14 -14
2023-10-17 04:20:00 7924646.999 1 us 8560 -14 -14
2023-10-17 04:30:00 7934971.643 0.25 us 8560 -14 -14
2023-10-17 10:12:00 -282340.81 0.1 Hz 7159.45 -47 -36
2023-10-17 13:39:00 -372429.1 0.1 Hz 7159.45 -47 -36
2023-10-18 07:20:00 13412114 1 us 8560 -14 -14
2023-10-20 07:30:00 -820448.422 0.1 Hz 8560 -14 -14
2023-10-20 08:00:00 29256044.28 0.375 us 8560 -14 -14
2023-10-21 05:50:00 36807821.03 0.375 us 8560 -14 -14
Station codes
-47 DSS-47 ATCA (W196) -36 DSS-36 Tidbinbilla (34-m) -14 DSS-14 Goldstone (70-m)