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JPL Small-Body Database Browser
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138 Tolosa
Classification: Main-belt Asteroid          SPK-ID: 2000138
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1628618183164473 3.6322e-08  
a 2.449489618562947 8.2861e-09 au
q 2.050561285336524 9.0423e-08 au
i 3.202500124612781 4.033e-06 deg
node 54.74623716052042 7.2963e-05 deg
peri 260.5140622726485 7.4196e-05 deg
M 348.6774441649217 1.6334e-05 deg
tp 2459044.540658286760
(2020-Jul-14.04065829)		 6.3637e-05 TDB
period 1400.270152266715
3.83		 7.1052e-06
1.945e-08		 d
yr
n .2570932469118498 1.3045e-09 deg/d
Q 2.84841795178937 9.6355e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2659  
   data-arc span      41435 days (113.44 yr)  
   first obs. used      1905-11-30  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49795  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:03:24  

Additional Information
 Earth MOID = 1.03983 au 
 Jupiter MOID = 2.43098 au 
 T_jup = 3.476 
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[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.8   n/a MPO473762 IRAS observations used: 6
diameter diameter 52.905 km 1.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.101 h n/a LCDB (Rev. 2019-August); 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) Planet. Space Sci. 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.html]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.273   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.877   0.042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.42, mean=7.21, max.=9.52) deg.
U-B UB 0.490   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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