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181751 Phaenops (1996 HS12)
Classification: Jupiter Trojan          SPK-ID: 2181751
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09253795072627841 6.5851e-08  
a 5.217238836193146 1.3945e-07 au
q 4.734446245842278 3.7309e-07 au
i 15.97200926329207 6.9723e-06 deg
node 45.70877528809039 1.6736e-05 deg
peri 157.5873705227357 4.136e-05 deg
M 35.49564132935271 3.2503e-05 deg
tp 2458771.327356607896
(2019-Oct-14.82735661)
0.0004022 TDB
period 4352.707708182573
11.92
0.00017451
4.778e-07
d
yr
n .08270713866755694 3.3159e-09 deg/d
Q 5.700031426544014 1.5235e-07 au
  Orbit Determination Parameters
   # obs. used (total)      409  
   data-arc span      8831 days (24.18 yr)  
   first obs. used      1996-04-17  
   last obs. used      2020-06-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51801  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:31:53  

Additional Information
 Earth MOID = 3.73469 au 
 Jupiter MOID = .658543 au 
 T_jup = 2.914 
[ 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 13.03   n/a E2021B55  
diameter diameter 15.046 km 0.963 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.045   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

181751 Phaenops           Discovered 1996 Apr. 17 by E. W. Elst at the European Southern Observatory.
Phaenops, the father of Xanthos and Thouon, was left in bitter grief and anguish, after hearing that Diomedes had killed both of his sons.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100726/MPCPages.arcLast Updated: 2010-07-28

Alternate Designations
 1996 HS12 = 2002 VN4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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