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JPL Small-Body Database Browser
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15663 Periphas (4168 T-2)
Classification: Jupiter Trojan          SPK-ID: 2015663
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1045085675255637 7.1066e-08  
a 5.19382449470876 1.2277e-07 au
q 4.651025336787563 4.2396e-07 au
i 33.88645522542458 8.7678e-06 deg
node 12.08539984325176 1.1882e-05 deg
peri 23.65197992688917 4.2143e-05 deg
M 295.462194079429 4.3936e-05 deg
tp 2459375.570179912354
(2021-Jun-10.07017991)
0.00053764 TDB
period 4323.438964005905
11.84
0.0001533
4.197e-07
d
yr
n .08326704805991758 2.9524e-09 deg/d
Q 5.736623652629958 1.356e-07 au
  Orbit Determination Parameters
   # obs. used (total)      840  
   data-arc span      16857 days (46.15 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50413  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 23:23:54  

Additional Information
 Earth MOID = 3.67136 au 
 Jupiter MOID = .209483 au 
 T_jup = 2.652 
[ 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 10.8   n/a MPO302162  
diameter diameter 36.200 km 0.261 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.071   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

15663 Periphas           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
The Greek hero Periphas from Aetolia was killed by the god Ares. Ares tried to get the armor of Periphas, but Diomedes wounded Ares, with the help of Pallas Athene.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 4168 T-2 = 1985 SG7 = 2000 FR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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