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
2024-01-19 09:19:07 C 06 00 44.621 -14 53 55.12 X F52
2024-02-14 05:49:40 C 05 16 25.365 -09 03 10.30 X F51
2024-02-14 06:05:34 C 05 16 24.742 -09 02 59.18 X F51
2024-02-14 06:21:27 C 05 16 24.119 -09 02 47.88 X F51
2024-02-22 06:35:02 C 05 11 25.205 -06 44 54.44 X F51
2024-02-22 06:53:17 C 05 11 24.845 -06 44 41.01 X F51
2024-02-22 07:29:51 C 05 11 24.171 -06 44 14.65 X F51
2024-12-01 09:13:55 C 06 09 45.486 -06 30 12.35 V G96
2024-12-01 09:22:13 C 06 09 44.626 -06 30 17.14 V G96
2024-12-01 09:30:37 C 06 09 43.783 -06 30 22.25 V G96
2024-12-02 09:17:25 C 06 07 19.506 -06 44 01.82 V G96
2024-12-02 09:24:49 C 06 07 18.728 -06 44 06.25 V G96
2024-12-02 09:32:13 C 06 07 17.951 -06 44 10.46 V G96
2024-12-02 09:39:38 C 06 07 17.173 -06 44 14.57 V G96
2024-12-03 12:24:26 C 06 04 32.197 -06 58 59.57 X F51
2024-12-03 12:34:57 C 06 04 31.076 -06 59 05.30 X F51
2024-12-03 13:39:50 C 06 04 24.166 -06 59 40.10 X F51
2024-12-05 11:07:46 C 05 59 38.222 -07 23 14.82 X F51
2024-12-05 11:23:57 C 05 59 36.453 -07 23 22.92 X F51
2024-12-05 11:40:06 C 05 59 34.696 -07 23 30.90 X F51
2024-12-09 11:10:14 C 05 49 15.671 -08 06 19.21 X F52
2024-12-09 11:29:44 C 05 49 13.474 -08 06 26.91 X F52
2024-12-09 11:49:13 C 05 49 11.284 -08 06 34.67 X F52
2024-12-21 09:26:53 C 05 18 07.627 -09 14 16.78 X F51
2024-12-21 09:57:33 C 05 18 04.327 -09 14 18.90 X F51
2024-12-21 10:12:53 C 05 18 02.687 -09 14 20.13 X F51
2024-12-27 06:22:30 C 05 04 04.008 -09 13 58.30 V G96
2024-12-27 06:30:39 C 05 04 03.198 -09 13 57.43 V G96
2024-12-27 06:38:47 C 05 04 02.402 -09 13 57.00 V G96
2024-12-27 06:46:57 C 05 04 01.596 -09 13 56.53 V G96
2024-12-27 09:26:28 C 05 03 46.616 -09 13 42.14 X F51
2024-12-27 09:44:16 C 05 03 44.884 -09 13 40.70 X F51
2024-12-27 10:19:53 C 05 03 41.433 -09 13 37.74 X F51
2025-01-03 07:38:22 C 04 49 24.049 -08 47 37.25 X F51
2025-01-03 07:54:49 C 04 49 22.714 -08 47 33.41 X F51
2025-01-03 08:11:15 C 04 49 21.386 -08 47 29.76 X F51
2025-01-03 08:27:43 C 04 49 20.054 -08 47 25.98 X F51
2025-01-06 07:44:18 C 04 44 02.030 -08 29 12.27 X F51
2025-01-06 08:05:20 C 04 44 00.499 -08 29 06.26 X F51
2025-01-06 08:26:23 C 04 43 58.952 -08 29 00.50 X F51
2025-01-06 08:47:30 C 04 43 57.405 -08 28 54.34 X F51
2025-01-17 06:19:19 C 04 29 16.605 -06 55 58.76 X F51
2025-01-17 06:37:47 C 04 29 15.788 -06 55 51.06 X F51
2025-01-17 06:56:16 C 04 29 14.966 -06 55 43.36 X F51
2025-01-17 07:14:46 C 04 29 14.142 -06 55 35.59 X F51
2025-10-29 09:24:24 C 05 44 01.082 +03 28 10.20 V G96
2025-10-29 09:31:51 C 05 43 59.988 +03 28 00.12 V G96
2025-10-29 09:39:16 C 05 43 58.904 +03 27 49.97 V G96
2025-10-29 09:46:42 C 05 43 57.817 +03 27 40.10 V G96
2025-10-31 13:13:19 C 05 36 30.942 +02 18 33.42 X F51
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)