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791 Ani (A914 MB)
Classification: Main-belt Asteroid          SPK-ID: 2000791
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 59 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1929612006043273 2.2329e-08  
a 3.122654720722525 1.0906e-08 au
q 2.520103516739137 6.7635e-08 au
i 16.38103803385909 5.0307e-07 deg
node 129.8119581909369 1.8909e-06 deg
peri 201.5557745054803 4.0011e-06 deg
M 68.72715954544388 3.2516e-06 deg
tp 2458815.721967048792
(2019-Nov-28.22196705)
1.6751e-05 TDB
period 2015.507301314299
5.52
1.0559e-05
2.891e-08
d
yr
n .1786150810593672 9.3571e-10 deg/d
Q 3.725205924705914 1.301e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3468  
   data-arc span      38450 days (105.27 yr)  
   first obs. used      1915-12-06  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3908  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:26:51  

Additional Information
 Earth MOID = 1.51339 au 
 Jupiter MOID = 1.64389 au 
 T_jup = 3.125 
[ 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 9.24   n/a MPCxxxxx IRAS observations used: 17
diameter diameter 116.865 km 1.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 11.174 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Polakis, T. (2018) Minor Planet Bull. 45, 347-352.]
geometric albedo albedo 0.026   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.708   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.27 deg.
U-B UB 0.282   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.27 deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

791 Ani (A914 MB)          Discovered 1914-Jun-29 by Neujmin, G. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A914 MB = 1949 WH = 1964 PO = 1975 XM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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