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131 Vala
Classification: Main-belt Asteroid          SPK-ID: 2000131
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06823298156865384 3.9199e-08  
a 2.431981028014236 7.9362e-09 au
q 2.266039711354425 9.5783e-08 au
i 4.960163523315837 4.6304e-06 deg
node 65.68150799934757 4.5735e-05 deg
peri 160.6408163703682 5.5221e-05 deg
M 289.2753487460519 3.2224e-05 deg
tp 2457872.649170354511
(2017-Apr-29.14917035)
0.00012449 JED
period 1385.283625872313
3.79
6.7808e-06
1.856e-08
d
yr
n .2598745796719485 1.2721e-09 deg/d
Q 2.597922344674047 8.4777e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1701  
   data-arc span      52187 days (142.88 yr)  
   first obs. used      1873-05-30  
   last obs. used      2016-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49191  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:25:36  

Additional Information
 Earth MOID = 1.25637 au 
 Jupiter MOID = 2.37651 au 
 T_jup = 3.499 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.03 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
diameter diameter 40.44 km 1.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
rotation period rot_per 5.1812 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2009) Minor Planet Bul. 36, 100-102.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Galad, A.; Kornos, L.; Vilagi, J. (2010) Minor Planet Bul. 37, 9-15.]
geometric albedo albedo 0.1051   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
B-V BV .829 mag .034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=12.78 deg.
U-B UB .402 mag .053 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=12.78 deg.
Tholen spectral type spec_T SU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Xc   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)

131 Vala          Discovered 1873-May-24 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1945 KA = 1952 DS3 = 1953 QE 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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