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326 Tamara
Classification: Main-belt Asteroid          SPK-ID: 2000326
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1903643518281844 3.9777e-08  
a 2.317175887544389 6.0456e-09 au
q 1.876068201640103 9.3161e-08 au
i 23.72969154460784 5.1029e-06 deg
node 32.20152700045843 9.4809e-06 deg
peri 238.5862389008171 1.6592e-05 deg
M 305.5438897629659 1.5487e-05 deg
tp 2458795.386180334470
(2019-Nov-07.88618033)
5.5723e-05 TDB
period 1288.35909533428
3.53
5.0421e-06
1.38e-08
d
yr
n .279425201641157 1.0935e-09 deg/d
Q 2.758283573448674 7.1965e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2128  
   data-arc span      46008 days (125.96 yr)  
   first obs. used      1893-09-20  
   last obs. used      2019-09-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45817  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:52:12  

Additional Information
 Earth MOID = .943952 au 
 Jupiter MOID = 2.44126 au 
 T_jup = 3.445 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.36   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
diameter diameter 93.00 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 14.445 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Gil-Hutton, R. (1993) Rev. Mexicana Astron. Astrof. 25, 75-77.]
[Pray, D.P. (2006) Minor Planet Bull. 33, 4-5.]
[Higgins, D. (2011) Minor Planet Bull. 38, 41-46.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.0368   0.001 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
B-V BV 0.708   0.048 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=8.69, mean=14.40, max.=22.86) deg.
U-B UB 0.318   0.019 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=8.69, mean=14.40, max.=22.86) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

326 Tamara          Discovered 1892-Mar-19 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A899 OD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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