171576 (1999 VP11)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5836605346 ± 1.64e-08
Semi-major axis (a)1.0857331459 AU ± 8.70e-10
Inclination (i)17.27622291° ± 2.88e-06
Long. of Asc. Node (Ω)208.06025056° ± 1.58e-06
Arg. of Perihelion (ω)61.76358487° ± 2.22e-06
Mean Anomaly (M)99.66941613° ± 2.85e-06
Mean Motion (n)0.8712195884°/day ± 1.05e-09
Perihelion dist (q)0.45203356 AU ± 1.78e-08
Aphelion dist (Q)1.71943273 AU ± 1.78e-08
Orbital Period1.13131786 yr ± 1.36e-09
Physical Parameters
H (abs. magnitude)18.68
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.312″
Uncertainty0
Orbit TypeApollo
MOID0.003011 AU
Observations Used525
Radar Obs Used6
Gaia Obs Used9
Oppositions2
Arc Total1999-2026
First Observation Used1999-11-07
Last Observation Used2026-01-12
Observations (569)
Date Type RA Dec Mag Band Observatory
1999-11-12 12:52:08 C 04 30 41.40 -04 10 11.9 c 474
1999-11-12 12:54:59 C 04 30 40.84 -04 10 15.8 c 474
1999-11-13 11:45:37 C 04 26 46.86 -04 33 06.0 c 474
1999-11-13 11:58:05 C 04 26 44.69 -04 33 18.3 c 474
1999-11-13 12:07:08 C 04 26 43.11 -04 33 27.1 c 474
1999-11-13 14:15:46 C 04 26 21.39 -04 35 58.5 z 402
1999-11-13 14:17:34 C 04 26 21.11 -04 35 59.7 z 402
1999-11-13 14:19:24 C 04 26 20.76 -04 36 01.2 z 402
1999-11-16 15:46:45 C 04 14 13.82 -05 41 25.2 360
1999-11-16 15:53:15 C 04 14 12.75 -05 41 30.7 360
1999-11-16 15:58:59 C 04 14 11.80 -05 41 35.2 360
1999-11-17 12:01:48 C 04 11 01.51 -05 56 58.6 c 474
1999-11-17 12:03:09 C 04 11 01.29 -05 56 59.4 c 474
1999-11-17 12:04:32 C 04 11 01.16 -05 56 59.9 c 474
1999-11-17 12:06:00 C 04 11 00.91 -05 57 02.1 c 474
1999-11-19 23:48:06 C 04 01 54.48 -06 39 25.8 z 587
1999-11-19 23:53:26 C 04 01 53.68 -06 39 30.2 z 587
1999-11-26 22:46:31 C 03 39 36.69 -07 58 38.5 c 046
1999-11-26 22:49:15 C 03 39 36.26 -07 58 38.9 c 046
1999-11-26 22:51:23 C 03 39 36.08 -07 58 40.1 c 046
1999-11-26 22:53:35 C 03 39 35.77 -07 58 41.0 c 046
1999-11-26 22:55:50 C 03 39 35.54 -07 58 41.5 c 046
1999-11-28 21:09:19 C 03 34 17.73 -08 11 40.6 z 587
1999-11-28 21:15:29 C 03 34 16.93 -08 11 42.8 z 587
1999-11-28 21:24:40 C 03 34 15.88 -08 11 43.2 z 587
1999-11-29 21:52:25 C 03 31 36.52 -08 17 11.0 c 046
1999-11-29 21:56:07 C 03 31 36.09 -08 17 12.4 c 046
1999-11-29 21:59:36 C 03 31 35.78 -08 17 13.2 c 046
1999-12-02 21:30:40 C 03 24 26.91 -08 28 00.0 z 587
1999-12-02 21:40:39 C 03 24 25.95 -08 28 01.7 z 587
1999-12-07 13:50:00 C 03 14 59.31 -08 31 21.8 360
1999-12-07 13:55:44 C 03 14 58.90 -08 31 21.4 360
1999-12-07 14:01:45 C 03 14 58.41 -08 31 21.7 360
1999-12-18 14:53:02 C 03 00 23.92 -07 50 29.3 413
1999-12-18 15:00:17 C 03 00 23.59 -07 50 28.0 413
1999-12-18 15:06:13 C 03 00 23.37 -07 50 28.4 413
2000-01-09 01:40:34 C 02 54 55.93 -04 51 52.6 b 691
2000-01-09 01:59:26 C 02 54 56.04 -04 51 45.0 b 691
2000-01-09 02:10:45 C 02 54 56.26 -04 51 40.6 b 691
2000-11-23 02:48:42 C 22 11 39.36 -16 11 09.3 696
2000-11-23 02:51:30 C 22 11 40.23 -16 11 07.7 696
2000-12-02 10:49:44 C 23 10 15.15 -13 45 55.9 413
2000-12-02 10:54:32 C 23 10 16.18 -13 45 52.7 413
2000-12-03 11:00:16 C 23 15 25.70 -13 29 36.9 413
2000-12-03 11:07:48 C 23 15 27.31 -13 29 31.8 413
2004-12-03 11:24:54 C 10 24 49.38 -14 49 43.9 d 291
2004-12-03 11:39:45 C 10 24 50.60 -14 49 59.0 d 291
2004-12-03 11:45:09 C 10 24 51.10 -14 50 06.3 d 291
2005-12-25 13:45:10 C 08 24 58.49 -18 41 31.2 r E17
2005-12-25 13:51:21 C 08 24 58.09 -18 41 35.8 r E17
Radar Observations (6)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2017-10-24 05:20:00 -1000713.203 3 Hz 8560 -14 -14
2017-10-24 05:30:00 -1002732.54 3 Hz 8560 -14 -14
2017-10-24 05:40:00 26252169.71 2 us 8560 -14 -14
2017-10-24 06:00:00 26393298.09 0.5 us 8560 -14 -14
2017-10-25 05:20:00 36832306.817 1 us 8560 -14 -14
2017-10-26 04:00:00 47633179 1 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)