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25 Phocaea (A853 GB)
Classification: Main-belt Asteroid          SPK-ID: 2000025
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2548956117444365 2.8218e-08  
a 2.399561512585203 3.1694e-09 au
q 1.787923812916393 6.7315e-08 au
i 21.60666665735258 3.1321e-06 deg
node 214.1202790971407 8.0719e-06 deg
peri 90.30961922882817 1.0434e-05 deg
M 278.8823406292084 6.9173e-06 deg
tp 2459306.420913968540
(2021-Apr-01.92091397)
2.6462e-05 TDB
period 1357.676366440251
3.72
2.6899e-06
7.365e-09
d
yr
n .265158920710905 5.2535e-10 deg/d
Q 3.011199212254014 3.9773e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3492  
   data-arc span      58605 days (160.45 yr)  
   first obs. used      1860-03-11  
   last obs. used      2020-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43674  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:34:13  

Additional Information
 Earth MOID = .923068 au 
 Jupiter MOID = 2.52838 au 
 T_jup = 3.389 
[ 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 7.8   n/a MPO502153 IRAS observations used: 21
diameter diameter 61.054 km 2.463 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.9341 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 200-220.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Buchheim, R.K. (2007) Minor Planet Bull. 34, 68-71.]
[Pilcher, F. (2009) Minor Planet Bull. 36, 133-136.]
[Pilcher, F. (2011) Minor Planet Bull. 38, 76-78.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.350   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.932   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=9.54, mean=17.15, max.=25.41) deg.
U-B UB 0.513   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=9.54, mean=17.15, max.=25.41) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

25 Phocaea (A853 GB)          Discovered 1853-Apr-06 by Chacornac, J. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A853 GB = 1956 GC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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