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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 99 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1792372700236851 | 2.9498e-08 | |
| a | 2.678166941528901 | 6.2543e-09 | au |
| q | 2.198139610261579 | 7.6802e-08 | au |
| i | 5.755871694623325 | 2.872e-06 | deg |
| node | 156.9252688933148 | 3.5697e-05 | deg |
| peri | 180.7167803924005 | 3.7455e-05 | deg |
| M | 34.3480462035799 | 1.2505e-05 | deg |
| tp | 2458847.759421222181
(2019-Dec-30.25942122) | 5.5296e-05 | TDB |
| period | 1600.865680513846
4.38 | 5.6077e-06
1.535e-08 | d
yr |
| n | .2248783295075993 | 7.8773e-10 | deg/d |
| Q | 3.158194272796223 | 7.3753e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.3 |
|
n/a |
MPO492750 |
IRAS observations used: 14 |
| magnitude slope |
G |
0.24 |
|
n/a |
PDS3 (MPC 17258) |
Fit |
| diameter |
diameter |
85.877 |
km |
3.141 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
3.7474 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Lagerkvist, C.-I.; Rickman, H.; Scaltriti, F.; Zappala, V. (1981) Astron. Astrophys. 104, 148-149.]
[Lagerkvist, C.-I.; Rickman, H. (1981) Moon Planets 24, 437-440.]
[Surdej, J.; Louis, R.; Cramer, N.; Rufener, F.; et al. (1983) Astron. Astrophys. Suppl. Ser. 54, 371-378.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[Erikson, A.; Magnusson, P. (1993) Icarus 103, 62-66.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Michalowski, T. (1996) Icarus 123, 456-462.]
[Shevchenko, V.G.; Bel'skaya, I.N.; Krugly, Yu.N.; Chiorny, V.G.; Gaftonyuk, N.M. (2002) Icarus 155, 365-374.]
[Tungalag, N.; Shevchenko, V.G.; Lupishko, D.F. (2002) Kin. Fiz. Neb. Tel 18, 508-516; Kinematics and Physics of Celestial Bodies 18, ???-???.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Proyecto ECLA (Silvia Alonso Perez) (2011) http://www.geocities.com/proyectoecla/]
[Alton, K.B. (2012) Minor Planet Bull. 39, 107-108.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Mizoguchi, T.; Tanaka, A.; Nakata, A.; Hirono, K.; et a. (2017) Minor Planet Bull. 44, 190.] |
| geometric albedo |
albedo |
0.040 |
|
0.010 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.720 |
|
0.021 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=13; phase (min.=4.34, mean=14.75, max.=24.15) deg. |
| U-B |
UB |
0.233 |
|
0.017 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=7; phase (min.=4.34, mean=11.63, max.=20.88) deg. |
| Tholen spectral type |
spec_T |
M |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
X |
|
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) |
|
| 201 Penelope (A879 PA) Discovered 1879-Aug-07 by Palisa, J. at Pola |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
[ hide close-approach data ]
Close-Approach Data ...sorted by Date/Time (TDB)
|
| Date/Time (TDB) |
Time Uncertainty
(days_HH:MM) |
Body |
Nominal Distance (au) |
Minimum Distance (au) |
Maximum Distance (au) |
V-relative (km/s) |
V-infinity (km/s) |
JD (TDB) |
Time Uncertainty (minutes) |
Semi-major axis (km) |
Semi-minor axis (km) |
range-LOV angle (deg) |
N-sigma |
BP |
Orbit Ref. |
Reference |
Modified |
| 1987-Jan-10 04:11 |
00:01 |
Psych |
0.0363811835727419 |
0.0363803747864658 |
0.0363819923682783 |
1.68760572568526 |
1.68760552862213 |
2446805.674353368 |
1.08928529780904 |
62.0565937440504 |
31.8960043670956 |
-62.8434649004731 |
156226.186393637 |
T |
99 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:52 |
2020-Dec-18 01:51 |
| 2178-Dec-18 06:34 |
< 00:01 |
Europ |
0.0487188469194176 |
0.0487178843916701 |
0.0487198106677061 |
4.11340647398088 |
4.1134064209446 |
2516909.773646839 |
0.836446749639957 |
433.444844374888 |
21.6919065595073 |
-84.3288935265939 |
334133.916653201 |
T |
99 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:52 |
2020-Dec-18 01:51 |
| 2200-Oct-12 02:53 |
< 00:01 |
David |
0.0289105708744371 |
0.0289012025400066 |
0.0289199397211074 |
5.77275153356407 |
5.77275144304428 |
2524877.620471519 |
0.584208317322906 |
504.896535560248 |
20.8245029274961 |
22.3691793336033 |
79394.8600325471 |
T |
99 |
CATAB v2.0f-lin.ifort 2020-Dec-18 01:51:52 |
2020-Dec-18 01:51 |
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