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138 Tolosa (A874 KA)
Classification: Main-belt Asteroid          SPK-ID: 2000138
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 73 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1628618052263127 3.5565e-08  
a 2.449489617934408 7.0866e-09 au
q 2.050561316874499 8.841e-08 au
i 3.202500192116913 3.8269e-06 deg
node 54.7461884263532 7.0816e-05 deg
peri 260.514122813155 7.1834e-05 deg
M 348.6774349669717 1.3454e-05 deg
tp 2459044.540694046516
(2020-Jul-14.04069405)
5.2385e-05 TDB
period 1400.270151727751
3.83
6.0766e-06
1.664e-08
d
yr
n .257093247010805 1.1157e-09 deg/d
Q 2.848417918994317 8.2407e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2990  
   data-arc span      41973 days (114.92 yr)  
   first obs. used      1905-11-30  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48197  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:58  

Additional Information
 Earth MOID = 1.03983 au 
 Jupiter MOID = 2.43098 au 
 T_jup = 3.476 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455672.5 (2011-Apr-21.0) TDB
Reference: JPL 73 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1621428500756218 3.5371e-08  
q 2.05195985533891 8.7819e-08 au
tp 2456241.957600280064
(2012-Nov-10.45760028)
5.093e-05 TDB
node 54.90907939518542 7.0633e-05 deg
peri 259.8413424830387 7.1679e-05 deg
i 3.2069553027227 3.8311e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2990  
   data-arc span      41973 days (114.92 yr)  
   first obs. used      1905-11-30  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48197  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:32:58  

Additional Information
 Jupiter MOID = 2.43098 au 
 T_jup = 3.476 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.251131308828175E-15 -3.099592027112711E-15 1.550719579273628E-13 -2.859488267346801E-15 3.706043037894843E-14 3.100344848978171E-16
q -3.099592027112711E-15 7.712131262231346E-15 -3.571151617152656E-13 7.486143501733348E-15 -9.010524656206377E-14 -6.908730744551955E-16
tp 1.550719579273628E-13 -3.571151617152656E-13 2.593840243987403E-9 -4.517839533555999E-12 6.383173754610756E-10 1.979451563253633E-13
node -2.859488267346801E-15 7.486143501733348E-15 -4.517839533555999E-12 4.989012991439208E-9 -4.981660084212759E-9 -1.036160131362574E-11
peri 3.706043037894843E-14 -9.010524656206377E-14 6.383173754610756E-10 -4.981660084212759E-9 5.137907124257042E-9 1.037703503691112E-11
i 3.100344848978171E-16 -6.908730744551955E-16 1.979451563253633E-13 -1.036160131362574E-11 1.037703503691112E-11 1.46772503242007E-11

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 (A874 KA)          Discovered 1874-May-19 by Perrotin, J. at Toulouse
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A874 KA = A909 SB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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