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721 Tabora (A911 UM)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000721
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1169330545689977 4.309e-08  
a 3.554019465555723 1.7112e-08 au
q 3.138437113450616 1.5662e-07 au
i 8.320081866861132 4.8756e-06 deg
node 38.40031923839938 2.7303e-05 deg
peri 352.5722805421159 3.2165e-05 deg
M 65.39847171457407 1.6885e-05 deg
tp 2458555.926851173538
(2019-Mar-13.42685117)
0.00011413 TDB
period 2447.248832909041
6.70
1.7674e-05
4.839e-08
d
yr
n .1471039622775378 1.0624e-09 deg/d
Q 3.969601817660831 1.9112e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2746  
   data-arc span      39634 days (108.51 yr)  
   first obs. used      1911-10-18  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45857  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:11:17  

Additional Information
 Earth MOID = 2.14447 au 
 Jupiter MOID = 1.47275 au 
 T_jup = 3.088 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.3   n/a MPO502160 IRAS observations used: 9
diameter diameter 86.309 km 2.961 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.982 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Zappala, V.; Di Martino, M.; Cellino, A.; Farinella, P.; et al. (1989) Icarus 82, 354-368.]
[Licchelli, D. (2006) Minor Planet Bull. 33, 50-51.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.047   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.782   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.87, mean=10.58, max.=14.55) deg.
U-B UB 0.240   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.87, mean=10.58, max.=14.55) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

721 Tabora (A911 UM)          Discovered 1911-Oct-18 by Kaiser, F. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A911 UM = 1935 FX = 1951 VH = A911 UH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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