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JPL Small-Body Database Browser
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265 Anna
Classification: Main-belt Asteroid          SPK-ID: 2000265
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .267370201142705 3.825e-08  
a 2.419799425110903 7.6703e-09 au
q 1.772817166093999 9.2811e-08 au
i 25.64332509742683 5.6307e-06 deg
node 335.5436716271263 8.7467e-06 deg
peri 251.6801192612908 1.3235e-05 deg
M 346.5988180010232 1.0613e-05 deg
tp 2458651.680919642568
(2019-Jun-17.18091964)
4.0577e-05 TDB
period 1374.888504068627
3.76
6.5372e-06
1.79e-08
d
yr
n .2618394138395028 1.245e-09 deg/d
Q 3.066781684127807 9.721e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1937  
   data-arc span      43733 days (119.73 yr)  
   first obs. used      1899-08-14  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41108  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:05:21  

Additional Information
 Earth MOID = .913127 au 
 Jupiter MOID = 2.33077 au 
 T_jup = 3.335 
[ 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 11.9   n/a MPO267706  
diameter diameter 22.767 km 0.379 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 11.681 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Bembrick, C.S.; Bolt, G. (2005) Minor Planet Bull. 32, 18-19.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.113   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

265 Anna          Discovered 1887-Feb-25 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1933 QN = 1933 RC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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