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JPL Small-Body Database Browser
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196 Philomela
Classification: Main-belt Asteroid          SPK-ID: 2000196
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 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01590653744791651 3.6904e-08  
a 3.113336492309564 7.3443e-09 au
q 3.063814088806676 1.1451e-07 au
i 7.263021046748258 4.0483e-06 deg
node 72.32191559359714 3.0178e-05 deg
peri 199.7516501777808 0.00012599 deg
M 91.81938115359452 0.00012232 deg
tp 2458088.736414178285
(2017-Dec-01.23641418)
0.00068149 TDB
period 2006.492404774881
5.49
7.1e-06
1.944e-08
d
yr
n .1794175742421464 6.3487e-10 deg/d
Q 3.162858895812451 7.4612e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3404  
   data-arc span      51330 days (140.53 yr)  
   first obs. used      1879-05-15  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45212  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:03:40  

Additional Information
 Earth MOID = 2.04839 au 
 Jupiter MOID = 1.84598 au 
 T_jup = 3.206 
[ 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 6.54   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
diameter diameter 144.626 km 4.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.3340 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Yang, X.-y.; Zhang, Y.-y.; Li, X.-q. (1965) Acta Astron. Sin. 13, 66-74.]
[Zappala, V.; Scaltriti, F.; Di Martino, M. (1983) Icarus 56, 325-344.]
[Kryszczynska, A.; Colas, F.; Berthier, J.; Michalowski, T.; Pych, W. (1996) Icarus 124, 134-140.]
[Pray, D. (2004) Minor Planet Bull. 31, 34-36.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (2005) Planet. Space Sci. 53, 1147-1165.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Marciniak, A.; et al. (2007) Astron. Astrophys. 465, 331-337.]
geometric albedo albedo 0.342   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.852   0.011 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=1.96, mean=10.38, max.=18.01) deg.
U-B UB 0.451   0.029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=1.96, mean=10.38, max.=18.01) 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)

196 Philomela          Discovered 1879-May-14 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1934 JO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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