363027 (1998 ST27)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5297679948 ± 2.00e+00
Semi-major axis (a)0.8198152879 AU ± 3.00e+00
Inclination (i)21.05065934° ± 4.00e+00
Long. of Asc. Node (Ω)197.51457964° ± 5.00e+00
Arg. of Perihelion (ω)322.43883834° ± 6.00e+00
Mean Anomaly (M)88.40523181° ± 9.78e-06
Mean Motion (n)1.3278170992°/day ± 7.29e+00
Perihelion dist (q)0.38550339 AU ± 2.16e+00
Aphelion dist (Q)1.25412719 AU ± 4.87e+00
Orbital Period0.74229070 yr ± 4.07e+00
NGA Modelr2
A21.74180921e-06 AU/d²
Physical Parameters
H (abs. magnitude)19.58
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.474″
Uncertainty0
Orbit TypeAten
MOID0.009115 AU
Observations Used934
Oppositions9
Arc Total1998-2024
First Observation Used1998-09-24
Last Observation Used2024-10-14
Observations (1124)
Date Type RA Dec Mag Band Observatory
1998-09-24 03:54:55 C 22 04 35.26 +30 00 16.5 19.5 a 704
1998-09-24 04:27:10 C 22 04 27.64 +29 58 24.5 19.6 a 704
1998-09-24 04:59:34 C 22 04 19.55 +29 56 32.6 19.7 a 704
1998-09-24 05:31:50 C 22 04 11.80 +29 54 40.4 19.3 a 704
1998-09-24 21:59:30 C 22 00 23.57 +28 56 41.6 046
1998-09-24 22:01:00 C 22 00 23.27 +28 56 36.7 046
1998-09-24 22:02:04 C 22 00 23.01 +28 56 33.2 046
1998-09-24 22:03:05 C 22 00 22.75 +28 56 29.1 046
1998-09-25 01:28:30 C 21 59 34.55 +28 44 06.9 557
1998-09-25 01:30:40 C 21 59 34.08 +28 43 58.9 557
1998-09-25 11:52:42 C 21 57 13.53 +28 07 21.3 422
1998-09-25 11:54:05 C 21 57 13.40 +28 07 19.1 422
1998-09-25 11:56:12 C 21 57 12.84 +28 07 09.6 422
1998-09-25 11:57:38 C 21 57 12.46 +28 07 04.5 422
1998-09-25 22:09:57 C 21 54 53.39 +27 28 42.2 557
1998-09-25 22:11:16 C 21 54 53.09 +27 28 37.4 557
1998-09-25 22:13:59 C 21 54 52.46 +27 28 27.0 557
1998-09-25 22:45:46 C 21 54 45.07 +27 26 29.5 046
1998-09-25 22:47:20 C 21 54 44.69 +27 26 23.1 046
1998-09-25 22:48:27 C 21 54 44.44 +27 26 18.9 046
1998-09-25 22:49:33 C 21 54 44.19 +27 26 14.8 046
1998-09-26 06:57:55 C 21 52 54.15 +26 55 57.8 18.3 a 704
1998-09-26 07:45:53 C 21 52 43.09 +26 52 56.5 19.4 a 704
1998-09-26 08:09:48 C 21 52 37.46 +26 51 22.5 19.7 a 704
1998-09-26 08:33:44 C 21 52 32.18 +26 49 52.7 19.0 a 704
1998-09-26 11:52:56 C 21 51 49.22 +26 38 03.0 422
1998-09-26 11:54:38 C 21 51 48.80 +26 37 56.0 422
1998-09-26 11:56:03 C 21 51 48.49 +26 37 51.0 422
1998-09-26 11:57:16 C 21 51 48.21 +26 37 46.1 422
1998-09-26 12:11:06 C 21 51 45.52 +26 36 53.4 b 426
1998-09-26 12:16:10 C 21 51 44.34 +26 36 34.8 b 426
1998-09-26 12:21:42 C 21 51 43.03 +26 36 12.5 b 426
1998-09-26 12:27:06 C 21 51 41.68 +26 35 52.7 b 426
1998-09-26 18:32:13 C 21 50 21.54 +26 11 53.1 557
1998-09-26 18:33:34 C 21 50 21.24 +26 11 48.3 557
1998-09-26 18:56:39 C 21 50 16.00 +26 10 21.2 046
1998-09-26 18:58:32 C 21 50 15.54 +26 10 13.8 046
1998-09-26 19:00:57 C 21 50 15.09 +26 10 04.7 046
1998-09-26 19:02:35 C 21 50 14.64 +26 09 59.5 046
1998-09-27 09:13:58 C 21 47 04.74 +25 15 01.1 658
1998-09-27 09:20:45 C 21 47 03.19 +25 14 34.5 658
1998-09-27 09:29:45 C 21 47 01.21 +25 13 58.9 658
1998-09-27 19:20:59 C 21 44 54.52 +24 35 19.4 046
1998-09-27 19:22:18 C 21 44 54.16 +24 35 12.9 046
1998-09-27 19:24:59 C 21 44 53.53 +24 35 03.7 046
1998-09-27 19:26:18 C 21 44 53.32 +24 34 58.3 046
1998-09-29 04:08:03 C 21 37 54.80 +22 23 07.0 658
1998-09-29 04:12:06 C 21 37 53.90 +22 22 50.3 658
1998-09-29 04:18:27 C 21 37 52.51 +22 22 24.3 658
1998-09-29 18:56:15 C 21 34 49.92 +21 21 54.0 046
Radar Observations (13)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2001-10-07 01:39:00 77102108.2 12 us 2380 -1 -1
2001-10-09 00:34:00 107972.7 1 Hz 2380 -1 -1
2001-10-09 00:54:00 67766228.3 8 us 2380 -1 -1
2001-10-09 02:47:00 67469526.191 1.5 us 2380 -1 -1
2004-10-03 10:24:00 139197784 2 us 2380 -1 -1
2004-10-04 09:50:00 133969457.4 2 us 2380 -1 -1
2004-10-06 11:14:00 125499084.5 2 us 2380 -1 -1
2024-10-04 11:00:00 77195497.4 10 us 8560 -14 -14
2024-10-04 11:30:00 77005452.764 1 us 8560 -14 -14
2024-10-05 06:20:00 69794337.38 2 us 8560 -14 -14
2024-10-09 04:10:00 36603483 1 us 8560 -14 -14
2024-10-11 01:40:00 25630281.69 0.5 us 8560 -14 -14
2024-10-12 01:30:00 23741602 0.5 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)