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
2008-10-27 09:33:19 C 04 51 19.38 +01 33 01.4 17.3 c 704
2008-10-27 09:50:03 C 04 51 13.25 +01 32 18.5 17.3 c 704
2008-10-30 08:04:07 C 04 27 36.39 -01 14 12.4 r 703
2008-10-30 08:14:28 C 04 27 33.04 -01 14 34.6 r 703
2008-10-30 08:25:01 C 04 27 29.59 -01 14 57.6 r 703
2008-10-30 08:35:21 C 04 27 26.20 -01 15 19.5 r 703
2008-11-08 06:04:00 C 03 32 05.14 -06 55 23.2 r 808
2008-11-08 06:13:59 C 03 32 03.12 -06 55 33.8 r 808
2008-11-20 06:49:54 C 02 48 47.88 -09 46 59.7 r 703
2008-11-20 07:00:22 C 02 48 46.80 -09 47 01.3 r 703
2008-11-20 07:10:45 C 02 48 45.61 -09 47 04.5 r 703
2008-11-20 07:21:11 C 02 48 44.46 -09 47 06.6 r 703
2008-12-02 05:33:19 C 02 28 23.59 -09 49 03.9 r 703
2008-12-02 05:41:58 C 02 28 23.19 -09 49 03.2 r 703
2008-12-02 05:50:34 C 02 28 22.80 -09 49 00.8 r 703
2008-12-02 05:59:22 C 02 28 22.22 -09 48 59.9 r 703
2013-12-26 08:12:20 C 10 25 37.57 -24 32 36.5 u 807
2013-12-26 08:18:42 C 10 25 37.89 -24 32 45.6 u 807
2013-12-26 08:26:00 C 10 25 38.25 -24 32 55.9 u 807
2014-11-23 14:29:40 C 08 20 58.930 -06 36 21.83 L F51
2014-11-23 14:46:05 C 08 20 58.862 -06 36 34.90 L F51
2014-11-23 15:02:31 C 08 20 58.769 -06 36 48.20 L F51
2014-12-19 13:00:53 C 08 01 06.719 -14 58 11.84 L F51
2014-12-19 13:18:37 C 08 01 05.492 -14 58 25.26 L F51
2014-12-19 13:36:18 C 08 01 04.255 -14 58 38.78 L F51
2015-01-01 06:39:09 C 07 34 58.46 -18 20 10.1 u 807
2015-01-01 06:43:43 C 07 34 57.99 -18 20 12.3 u 807
2015-01-01 06:48:30 C 07 34 57.49 -18 20 14.8 u 807
2015-01-01 06:52:51 C 07 34 57.02 -18 20 17.2 u 807
2015-01-01 06:57:42 C 07 34 56.48 -18 20 19.6 u 807
2015-01-03 06:08:36 C 07 29 56.36 -18 44 05.7 u 807
2015-01-03 06:12:15 C 07 29 55.95 -18 44 07.3 u 807
2015-01-03 06:16:05 C 07 29 55.54 -18 44 09.0 u 807
2015-01-03 06:19:35 C 07 29 55.12 -18 44 10.6 u 807
2015-01-03 06:23:24 C 07 29 54.71 -18 44 11.9 u 807
2015-02-03 04:22:09 C 06 00 38.11 -17 49 55.9 q 448
2015-02-03 04:57:29 C 06 00 34.37 -17 49 34.2 q 448
2015-02-03 05:32:00 C 06 00 30.64 -17 49 13.9 q 448
2015-02-03 07:02:15 C 06 00 21.664 -17 48 16.53 L F51
2015-02-03 07:19:08 C 06 00 19.851 -17 48 06.34 L F51
2015-02-03 07:53:04 C 06 00 16.220 -17 47 45.70 L F51
2015-02-04 03:16:55 C 05 58 17.02 -17 35 30.3 u 807
2015-02-04 03:26:11 C 05 58 16.03 -17 35 24.8 u 807
2015-02-04 03:35:09 C 05 58 15.07 -17 35 18.9 u 807
2015-02-26 02:37:10 C 05 21 41.16 -10 29 41.4 q 448
2015-02-26 03:16:39 C 05 21 39.45 -10 29 07.4 q 448
2015-03-03 01:08:51 C 05 17 52.23 -08 41 55.3 u 807
2015-03-03 01:16:15 C 05 17 52.02 -08 41 48.4 u 807
2015-03-03 01:23:39 C 05 17 51.79 -08 41 41.6 u 807
2015-12-22 06:07:02 C 05 58 34.41 -10 34 18.8 u 807
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)