| 2207 Antenor (1977 QH1) |
| Classification: Jupiter Trojan SPK-ID: 2002207 |
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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 42 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .01409779443326368 | 2.4585e-08 | |
| a | 5.159462096023579 | 5.624e-08 | au |
| q | 5.086725060007623 | 1.1192e-07 | au |
| i | 6.800786345553633 | 1.2291e-06 | deg |
| node | 159.0503077316796 | 1.6721e-05 | deg |
| peri | 310.12833298377 | 8.8245e-05 | deg |
| M | 152.6294823633283 | 8.6118e-05 | deg |
| tp | 2457385.648909160904
(2015-Dec-29.14890916) | 0.0010223 | TDB |
| period | 4280.604130903163
11.72 | 6.999e-05
1.916e-07 | d
yr |
| n | .08410027860344184 | 1.3751e-09 | deg/d |
| Q | 5.232199132039534 | 5.7033e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.98 |
|
n/a |
E2021B10 |
IRAS observations used: 9 |
| diameter |
diameter |
97.658 |
km |
0.504 |
urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G) |
|
| rotation period |
rot_per |
7.9647 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Gonano, M.; Di Martino, M.; Mottola, S.; Neukum, G. (1991) Adv. Space Res. 11, no. 12, 197-200.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 265-270.]
[Stephens, R.D.; Coley, D.R. (2017) Minor Planet Bull. 44, 252-257.]
[Stephens, R.D.; Pravec, P.; Kueakova, H.; Kusnirak, P.; et al. (2018) Minor Planet Bull. 45, 341-342.]
[Stephens, R. D.; Warner, B. D. (2019) MPB 46, 315-317.] |
| geometric albedo |
albedo |
0.051 |
|
0.003 |
urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G) |
|
| B-V |
BV |
0.733 |
|
0.035 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=1.44, mean=2.56, max.=4.58) deg. |
| U-B |
UB |
0.232 |
|
0.038 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=1.44, mean=2.56, max.=4.58) deg. |
| Tholen spectral type |
spec_T |
D |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
|
| 2207 Antenor | Discovered 1977 Aug. 19 by N. S. Chernykh at the Crimean Astrophysical Observatory. |
| This Trojan planet is named for the Trojan hero and sage who called for peace with the Greeks. He advised the citizens of Troy to put an end to the war by returning the kidnapped Helen to her husband Menelaus. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: MPC 5849 | Last Updated: 2006-03-21 |
|
Alternate Designations
| 1977 QH1 = 1959 EM = 1971 BE1 = 1978 UU |
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