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
2023-10-19 19:54:04 C 00 26 50.99 +16 32 15.7 V C40
2023-10-19 20:03:20 C 00 26 57.18 +16 33 55.2 V C40
2023-10-20 01:39:57 B 00 30 56.17 +17 33 59.3 q X33
2023-10-20 01:41:58 B 00 30 57.27 +17 34 19.1 q X33
2023-10-20 01:44:01 B 00 30 58.36 +17 34 37.5 q X33
2023-10-20 04:09:00 V 00 32 25.45 +17 52 51.7 V 270
2023-10-20 04:09:00 v 1 273.16765 +33.48376 270
2023-10-20 04:15:12 V 00 32 28.87 +17 53 48.4 V 270
2023-10-20 04:15:12 v 1 273.16765 +33.48376 270
2023-10-20 04:21:08 V 00 32 32.06 +17 54 35.6 V 270
2023-10-20 04:21:08 v 1 273.16765 +33.48376 270
2023-10-20 04:28:20 V 00 32 35.79 +17 55 37.1 V 270
2023-10-20 04:28:20 v 1 273.16765 +33.48376 270
2023-10-20 09:20:11 C 00 35 22.618 +18 35 56.44 V T05
2023-10-20 09:24:44 C 00 35 24.718 +18 36 30.96 V T05
2023-10-20 09:32:33 C 00 35 28.313 +18 37 29.71 V T05
2023-10-20 09:48:25 C 00 35 35.587 +18 39 28.26 V T05
2023-10-20 09:52:19 C 00 35 37.356 +18 39 57.60 V T05
2023-10-20 09:56:50 C 00 35 39.444 +18 40 30.61 V T05
2023-10-20 18:51:46 C 00 40 16.00 +19 38 11.4 V C23
2023-10-20 18:52:24 C 00 40 16.27 +19 38 15.4 V C23
2023-10-20 18:54:42 C 00 40 17.23 +19 38 30.1 V C23
2023-10-20 18:56:40 C 00 40 18.03 +19 38 42.3 V C23
2023-10-20 19:15:51 C 00 40 26.590 +19 40 37.56 V Z80
2023-10-20 19:20:53 C 00 40 28.670 +19 41 08.81 V Z80
2023-10-21 00:53:06 C 00 42 27.91 +20 12 54.1 V C40
2023-10-21 01:02:26 C 00 42 31.50 +20 13 42.0 V C40
2023-10-21 01:11:40 C 00 42 35.06 +20 14 29.2 V C40
2023-10-21 02:04:48 V 00 43 17.60 +20 20 41.7 V 270
2023-10-21 02:04:48 v 1 272.68734 +30.46432 270
2023-10-21 02:11:20 V 00 43 19.70 +20 21 16.6 V 270
2023-10-21 02:11:20 v 1 272.68734 +30.46432 270
2023-10-21 02:17:44 V 00 43 21.83 +20 21 52.0 V 270
2023-10-21 02:17:44 v 1 272.68734 +30.46432 270
2023-10-21 02:23:44 V 00 43 23.81 +20 22 23.8 V 270
2023-10-21 02:23:44 v 1 272.68734 +30.46432 270
2023-10-21 05:23:09 C 00 44 26.632 +20 37 34.93 V 703
2023-10-21 05:30:58 C 00 44 29.036 +20 38 13.74 V 703
2023-10-21 05:38:49 C 00 44 31.438 +20 38 52.66 V 703
2023-10-21 05:46:29 C 00 44 33.778 +20 39 30.42 V 703
2023-10-21 07:23:20 C 00 45 14.526 +20 47 54.45 X F52
2023-10-21 07:59:01 C 00 45 24.929 +20 50 46.71 X F52
2023-10-21 10:37:03 V 00 46 16.20 +21 06 02.7 V 270
2023-10-21 10:37:03 v 1 175.46572 -37.91875 270
2023-10-21 10:42:53 V 00 46 17.78 +21 06 27.6 V 270
2023-10-21 10:42:53 v 1 175.46572 -37.91875 270
2023-10-21 10:48:58 V 00 46 19.53 +21 06 54.8 V 270
2023-10-21 10:48:58 v 1 175.46572 -37.91875 270
2023-10-21 10:55:04 V 00 46 21.19 +21 07 21.0 V 270
2023-10-21 10:55:04 v 1 175.46572 -37.91875 270
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)