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138 Tolosa
Classification: Main-belt Asteroid          SPK-ID: 2000138
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1616537736603544 3.2221e-08  
a 2.450552903576805 8.0407e-09 AU
q 2.054411779159276 7.9824e-08 AU
i 3.202958329748363 4.1006e-06 deg
node 54.80382171063165 6.7611e-05 deg
peri 260.5312587742796 6.8472e-05 deg
M 194.2739061859054 1.4902e-05 deg
tp 2457645.534500756027
(2016-Sep-14.03450076)
5.9489e-05 JED
period 1401.182004160775
3.84
6.8963e-06
1.888e-08
d
yr
n .2569259374806334 1.2645e-09 deg/d
Q 2.846694027994334 9.3405e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1937  
   data-arc span      40012 days (109.55 yr)  
   first obs. used      1905-11-30  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58139  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:33:33  

Additional Information
 Earth MOID = 1.04459 AU 
 T_jup = 3.476 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.75 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
diameter diameter 45.50 km 2.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 10.101 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Published Reference List:
[Harris, A.W. (1996) I.A.P.P.P. Comm. 65, 54-55.]
[Lopez-Gonzalez, M.J.; Rodriguez, E. (2005) Planetary and Space Science 53, 1147-1165.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Mendez, O.; Scheck, J.; Sosa, N. (2011) http://www.fisica.edu.uy/oalm/aster/aster.htm l]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.2699   0.027 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
B-V BV .877 mag .042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=5.42, mean=7.21, max.=9.52) deg.
U-B UB .490 mag .040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=5.42, mean=7.21, max.=9.52) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

138 Tolosa          Discovered 1874-May-19 by Perrotin, J. at Toulouse
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A909 SB 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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