Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .105192599439316 3.6322e-08  
a 5.196202623019881 9.0374e-08 au
q 4.649600561891027 2.4196e-07 au
i 33.88110361992026 2.3635e-06 deg
node 12.08962237581673 1.8547e-06 deg
peri 23.75513190378258 1.2244e-05 deg
M 345.3685912176385 1.3254e-05 deg
tp 2459376.337373044697
(2021-Jun-10.83737304)
0.00015877 TDB
period 4326.408703200351
11.85
0.00011287
3.09e-07
d
yr
n .08320989178246131 2.1708e-09 deg/d
Q 5.742804684148735 9.9881e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1346  
   data-arc span      17313 days (47.40 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43972  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 00:41:46  

Additional Information
 Earth MOID = 3.66962 au 
 Jupiter MOID = .21012 au 
 T_jup = 2.651 
[ 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 10.94   n/a E2021B10  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-11 02:42 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin