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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06801227592378768 4.3198e-08  
a 2.431781623081967 8.8466e-09 AU
q 2.26639062034652 1.059e-07 AU
i 4.960115799417085 5.22e-06 deg
node 65.69156784150137 4.7555e-05 deg
peri 160.962380687424 5.7036e-05 deg
M 132.9597148734615 3.2142e-05 deg
tp 2456488.932601727857
(2013-Jul-15.43260173)
0.00012291 JED
period 1385.113254441328
3.79
7.5584e-06
2.069e-08
d
yr
n .2599065447144265 1.4183e-09 deg/d
Q 2.597172625817414 9.4483e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1366  
   data-arc span      51623 days (141.34 yr)  
   first obs. used      1873-05-30  
   last obs. used      2014-10-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51679  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 13:44:44  

Additional Information
 Earth MOID = 1.25844 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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (AU) Minimum Distance (AU) Maximum Distance (AU) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2028-Apr-05 19:36 < 00:01 Pallas 0.0276401830814556 0.0276386840310659 0.0276416821719563 13.5604895431753 13.5604892881435 2461867.316863463 0.0552607772046791 92.7209242779469 21.8414325529874 37.5240003712413 120565.952102118 T 45 CATAB v2.0c-linF95 2014-Oct-09 13:44:49 2014-Oct-09 13:44

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