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
2017-11-12 16:43:07 C 01 07 46.88 -14 42 48.0 q C97
2017-11-12 16:45:17 C 01 07 46.89 -14 42 47.6 q C97
2017-11-12 16:47:27 C 01 07 46.95 -14 42 46.6 q C97
2017-11-14 08:23:36 C 01 09 16.70 -14 26 02.0 U T08
2017-11-14 08:34:53 C 01 09 17.02 -14 25 57.0 U T08
2017-11-14 08:46:09 C 01 09 17.34 -14 25 52.4 U T08
2017-11-14 08:57:27 C 01 09 17.69 -14 25 47.6 U T08
2017-11-16 06:01:03 C 01 10 55.66 -14 07 04.5 U 703
2017-11-16 06:09:00 C 01 10 55.89 -14 07 01.0 U 703
2017-11-16 06:16:56 C 01 10 56.11 -14 06 57.6 U 703
2017-11-16 06:24:52 C 01 10 56.34 -14 06 54.5 U 703
2017-11-18 08:25:10 C 01 12 41.52 -13 46 04.5 U T08
2017-11-18 08:47:41 C 01 12 42.18 -13 45 55.4 U T08
2017-11-18 08:58:56 C 01 12 42.50 -13 45 50.9 U T08
2017-11-20 05:24:12 C 01 14 14.09 -13 27 27.9 U 703
2017-11-20 05:32:06 C 01 14 14.35 -13 27 25.1 U 703
2017-11-20 05:40:01 C 01 14 14.51 -13 27 21.5 U 703
2017-11-20 05:47:58 C 01 14 14.81 -13 27 19.1 U 703
2017-11-22 08:02:20 C 01 15 57.53 -13 06 15.4 U T08
2017-11-22 08:12:14 C 01 15 57.78 -13 06 11.1 U T08
2017-11-22 08:22:10 C 01 15 58.09 -13 06 06.3 U T08
2017-11-22 08:32:03 C 01 15 58.34 -13 06 02.8 U T08
2017-11-23 08:07:54 C 01 16 46.68 -12 56 08.2 U T08
2017-11-23 08:19:41 C 01 16 47.01 -12 56 03.5 U T08
2017-11-23 08:31:19 C 01 16 47.36 -12 55 58.0 U T08
2017-11-23 08:43:18 C 01 16 47.69 -12 55 53.3 U T08
2017-11-24 05:00:34 C 01 17 29.52 -12 47 24.7 U 703
2017-11-24 05:10:20 C 01 17 29.81 -12 47 20.2 U 703
2017-11-24 05:19:58 C 01 17 30.12 -12 47 16.2 U 703
2017-11-24 05:29:36 C 01 17 30.34 -12 47 11.9 U 703
2017-12-21 03:16:56 C 01 42 32.50 -07 59 19.0 U G96
2017-12-21 03:25:02 C 01 42 32.81 -07 59 15.4 U G96
2017-12-21 03:33:08 C 01 42 33.19 -07 59 11.3 U G96
2017-12-21 03:41:14 C 01 42 33.53 -07 59 07.8 U G96
2019-01-21 05:21:27 C 00 48 11.613 -03 00 42.48 U F51
2019-01-21 05:29:34 C 00 48 12.596 -03 00 37.95 U F51
2019-01-21 05:45:46 C 00 48 14.574 -03 00 28.89 U F51
2022-12-22 09:12:36 C 09 28 32.171 -20 03 49.75 V G96
2022-12-22 09:19:59 C 09 28 32.164 -20 03 58.07 V G96
2022-12-22 09:27:23 C 09 28 32.146 -20 04 06.20 V G96
2022-12-22 09:34:46 C 09 28 32.077 -20 04 15.24 V G96
2023-01-23 00:00:47 C 08 49 32.270 -36 55 44.44 V M22
2023-01-23 00:04:48 C 08 49 31.704 -36 55 49.40 V M22
2023-01-23 00:14:15 C 08 49 30.480 -36 56 03.05 V M22
2023-01-23 00:28:50 C 08 49 28.531 -36 56 24.58 V M22
2023-01-26 21:33:37 C 08 36 21.026 -39 09 39.46 V M22
2023-01-26 21:38:18 C 08 36 20.273 -39 09 47.34 V M22
2023-01-26 21:42:52 C 08 36 19.627 -39 09 52.70 V M22
2023-01-26 22:34:48 C 08 36 11.112 -39 11 06.76 V M22
2023-01-28 04:00:02 C 08 31 26.129 -39 52 25.10 V W68
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)