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JPL Small-Body Database Browser
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274 Philagoria
Classification: Main-belt Asteroid          SPK-ID: 2000274
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1194619974345842 3.6686e-08  
a 3.045410485985242 1.2396e-08 au
q 2.681599666321217 1.1128e-07 au
i 3.677540029840751 4.0101e-06 deg
node 92.79481552992513 6.3066e-05 deg
peri 119.7223349528894 6.5265e-05 deg
M 230.6895051764381 1.8635e-05 deg
tp 2459297.765950465364
(2021-Mar-24.26595047)
0.00010218 TDB
period 1941.186154380046
5.31
1.1852e-05
3.245e-08
d
yr
n .1854536202969018 1.1323e-09 deg/d
Q 3.409221305649266 1.3877e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2925  
   data-arc span      46246 days (126.61 yr)  
   first obs. used      1893-03-19  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46972  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:51:38  

Additional Information
 Earth MOID = 1.67805 au 
 Jupiter MOID = 1.56276 au 
 T_jup = 3.225 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.0   n/a MPO337242  
diameter diameter 27.307 km 0.394 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 17.938 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2010) Minor Planet Bull. 37, 148-149.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.237   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

274 Philagoria          Discovered 1888-Apr-03 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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