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326 Tamara (A892 FD)
Classification: Main-belt Asteroid          SPK-ID: 2000326
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 97 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1903462726398647 3.9018e-08  
a 2.317135896414154 6.0707e-09 au
q 1.876077715331688 9.1329e-08 au
i 23.72625809829903 5.0859e-06 deg
node 32.18532770518884 9.4245e-06 deg
peri 238.4982913733977 1.6563e-05 deg
M 57.38668023326858 1.5552e-05 deg
tp 2458795.131284919807
(2019-Nov-07.63128492)
5.5325e-05 TDB
period 1288.325742634765
3.53
5.0629e-06
1.386e-08
d
yr
n .2794324355141434 1.0981e-09 deg/d
Q 2.75819407749662 7.2262e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2201  
   data-arc span      46339 days (126.87 yr)  
   first obs. used      1893-09-20  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44968  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:14:13  

Additional Information
 Earth MOID = .943809 au 
 Jupiter MOID = 2.44043 au 
 T_jup = 3.445 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455923.5 (2011-Dec-28.0) TDB
Reference: JPL 97 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1909233035670927 3.9105e-08  
q 1.874743580214108 9.1578e-08 au
tp 2456217.746217395612
(2012-Oct-17.24621740)
5.1884e-05 TDB
node 32.29117806585556 9.4227e-06 deg
peri 238.4006938411889 1.6499e-05 deg
i 23.73148565781566 5.0863e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2201  
   data-arc span      46339 days (126.87 yr)  
   first obs. used      1893-09-20  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44968  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:14:13  

Additional Information
 Jupiter MOID = 2.44043 au 
 T_jup = 3.445 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.529239577155311E-15 -3.576263903193578E-15 -8.054500406507926E-13 2.945934893713186E-15 -1.7334256037557E-13 1.697237308847156E-15
q -3.576263903193578E-15 8.38661484185734E-15 1.926300625558832E-12 -7.152375377510943E-15 4.138962496151464E-13 -3.631779936730374E-15
tp -8.054500406507926E-13 1.926300625558832E-12 2.691988086297669E-9 -1.260564508237288E-11 7.112775076264817E-10 4.712715698020097E-12
node 2.945934893713186E-15 -7.152375377510943E-15 -1.260564508237288E-11 8.878808692019818E-11 -8.369473474197538E-11 -9.09413748343609E-13
peri -1.7334256037557E-13 4.138962496151464E-13 7.112775076264817E-10 -8.369473474197538E-11 2.722155506697154E-10 2.070269710747518E-12
i 1.697237308847156E-15 -3.631779936730374E-15 4.712715698020097E-12 -9.09413748343609E-13 2.070269710747518E-12 2.587085635941534E-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 9.4   n/a MPO492752 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-August); 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 (A892 FD)          Discovered 1892-Mar-19 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A892 FD = A899 OD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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