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30704 Phegeus (3250 T-3)
Classification: Jupiter Trojan          SPK-ID: 2030704
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03906663466069673 5.3494e-08  
a 5.245874637376774 1.0288e-07 au
q 5.040935969442561 3.4461e-07 au
i 14.88997329332982 5.3804e-06 deg
node 20.48319197005378 1.7468e-05 deg
peri 283.0482042554517 8.4269e-05 deg
M 322.2698352016769 8.553e-05 deg
tp 2459660.450918062175
(2022-Mar-21.95091806)
0.0010434 TDB
period 4388.592824533394
12.02
0.0001291
3.535e-07
d
yr
n .08203085006827354 2.4131e-09 deg/d
Q 5.450813305310987 1.069e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1309  
   data-arc span      15660 days (42.87 yr)  
   first obs. used      1977-10-07  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53845  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:39:18  

Additional Information
 Earth MOID = 4.06354 au 
 Jupiter MOID = .160083 au 
 T_jup = 2.931 
[ 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 11.3   n/a MPO474159  
diameter diameter 27.002 km 0.362 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.088   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

30704 Phegeus           Discovered 1977 Oct. 16 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Phegeus was the oldest son of Dares, a priest of the god Hephaistos. Phegeus was fatally wounded with the spear of Diomedes.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030318/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 3250 T-3 = 1999 RG246 = 2000 RN38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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