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1583 Antilochus (1950 SA)
Classification: Jupiter Trojan          SPK-ID: 2001583
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05297024210714611 5.0309e-08  
a 5.136872779256864 6.1977e-08 au
q 4.864771384466019 2.9411e-07 au
i 28.50431455886483 4.5193e-06 deg
node 221.388434927866 7.7731e-06 deg
peri 186.5114751866436 3.7506e-05 deg
M 342.5283201987759 3.6329e-05 deg
tp 2459406.885319990235
(2021-Jul-11.38531999)
0.00042892 TDB
period 4252.522713430159
11.64
7.6961e-05
2.107e-07
d
yr
n .08465563249387506 1.5321e-09 deg/d
Q 5.408974174047708 6.526e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3033  
   data-arc span      34406 days (94.20 yr)  
   first obs. used      1926-11-10  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38205  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:56:36  

Additional Information
 Earth MOID = 3.87385 au 
 Jupiter MOID = .0172359 au 
 T_jup = 2.757 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.63   n/a E2021B10  
diameter diameter 108.842 km 0.543 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 15.759 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; Warner, B.D. (2018) Minor Planet Bull. 45, 48-50.]
[Stephens, R.D.; Warner, B.D. (2019) Minor Planet Bull. 46, 73-75.]
[Stephens, R.D.; Warner, B.D. (2020) Minor Planet Bull. 47, 43-46.]
geometric albedo albedo 0.054   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
B-V BV 0.752   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=2.04, mean=5.33, max.=7.88) deg.
U-B UB 0.253   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=2.04, mean=5.33, max.=7.88) 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

1583 Antilochus (1950 SA)          Discovered 1950-Sep-19 by Arend, S. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1950 SA = 1926 VF = 1974 WH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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