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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05263721599925692 5.35e-08  
a 5.135245402071114 7.2029e-08 au
q 4.864940380633105 3.2075e-07 au
i 28.50836772101471 4.5757e-06 deg
node 221.3847849853748 9.3107e-06 deg
peri 186.5174784163154 4.7077e-05 deg
M 325.5732819327314 4.8582e-05 deg
tp 2459406.974544140612
(2021-Jul-11.47454414)
0.00057613 TDB
period 4250.502054964841
11.64
8.9429e-05
2.448e-07
d
yr
n .08469587717984949 1.782e-09 deg/d
Q 5.405550423509122 7.5821e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2484  
   data-arc span      34046 days (93.21 yr)  
   first obs. used      1926-11-10  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41589  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:59:01  

Additional Information
 Earth MOID = 3.87495 au 
 Jupiter MOID = .0195365 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 8.60   n/a MPO265965  
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. 2019-August); 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.]
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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