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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2297500068672678 | 3.1921e-08 | |
| a | 2.774381675128922 | 4.2551e-09 | au |
| q | 2.13696746621563 | 8.8319e-08 | au |
| i | 34.854459486688 | 3.4569e-06 | deg |
| node | 172.9658838703218 | 6.2671e-06 | deg |
| peri | 310.2881128581827 | 9.1252e-06 | deg |
| M | 187.5863503676862 | 8.9153e-06 | deg |
| tp | 2460008.882460540304
(2023-Mar-05.38246054) | 4.2748e-05 | TDB |
| period | 1687.903982168052
4.62 | 3.8831e-06
1.063e-08 | d
yr |
| n | .2132822742307847 | 4.9067e-10 | deg/d |
| Q | 3.411795884042214 | 5.2327e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
4.21 |
|
n/a |
E2021B10 |
IRAS observations used: 19 |
| magnitude slope |
G |
0.11 |
|
n/a |
PDS3 (MPC 17257) |
Fit |
| diameter |
diameter |
545 |
km |
18 |
see ref. for extent |
computed from extent=582x556x500 km |
| extent |
extent |
582x556x500 |
km |
18 |
Schmidt et al. 2008, LPSC XXXIX |
|
| GM |
GM |
14.3 |
km^3/s^2 |
n/a |
JPL IOM 312.F01-006 |
|
| rotation period |
rot_per |
7.8132 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Schroll, A.; Haupt, H.F.; Maitzen, H.M. (1976) Icarus 27, 147-156.]
[Chang, Y.C.; Zhou, X.-h.; Yang, X.-y.; Zhang, Y.-y.; et al. (1981) Acta Astron. Sin. 22, 169-173; Chin. Astron. Astrophys. 5, 434-437.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Higley, S.; Hardersen, P.; Dyvig, R. (2008) Minor Planet Bull. 35, 63-66.]
[Carry, B.; Dumas, C.; Kaasalainen, M.; Berthier, J.; et al. (2010) Icarus 205, 460-472.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.] |
| geometric albedo |
albedo |
0.101 |
|
0.008 |
EAR_A_COMPIL_5_NEOWISEDIAM_V1_0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| B-V |
BV |
0.635 |
|
0.031 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=32; phase (min.=.19, mean=13.73, max.=25.65) deg. |
| U-B |
UB |
0.284 |
|
0.018 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=14; phase (min.=7.23, mean=14.81, max.=25.65) deg. |
| Tholen spectral type |
spec_T |
B |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
B |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) |
|
| 2 Pallas (A802 FA) Discovered 1802-Mar-28 by Olbers, H. W. at Bremen |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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