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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 103 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2549970905314515 2.8033e-08  
a 2.399704084671239 2.8413e-09 au
q 1.787786524943633 6.6981e-08 au
i 21.60653762250404 3.1238e-06 deg
node 214.1187472238284 8.0685e-06 deg
peri 90.31204683678847 1.0404e-05 deg
M 331.9209170087444 6.8063e-06 deg
tp 2459306.404736181435
(2021-Apr-01.90473618)
2.5784e-05 TDB
period 1357.797369564727
3.72
2.4115e-06
6.602e-09
d
yr
n .2651352904855061 4.7088e-10 deg/d
Q 3.011621644398845 3.5658e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3522  
   data-arc span      58605 days (160.45 yr)  
   first obs. used      1860-03-11  
   last obs. used      2020-08-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43631  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:10:43  

Additional Information
 Earth MOID = .921557 au 
 Jupiter MOID = 2.52729 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 7.85   n/a E2021B10 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. 2020-October); 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]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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