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JPL Small-Body Database Browser
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265 Anna (A887 DA)
Classification: Main-belt Asteroid          SPK-ID: 2000265
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2674901725231214 3.7695e-08  
a 2.419431586705923 7.3469e-09 au
q 1.772257414170066 9.137e-08 au
i 25.64924145041356 5.4414e-06 deg
node 335.5282159154964 8.6904e-06 deg
peri 251.6201233734149 1.2865e-05 deg
M 91.39205817666732 9.7566e-06 deg
tp 2458651.541000272992
(2019-Jun-17.04100027)
3.7025e-05 TDB
period 1374.575016779689
3.76
6.2611e-06
1.714e-08
d
yr
n .2618991292620731 1.1929e-09 deg/d
Q 3.066605759241779 9.3122e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2031  
   data-arc span      43848 days (120.05 yr)  
   first obs. used      1899-08-14  
   last obs. used      2019-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41229  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:22:27  

Additional Information
 Earth MOID = .912158 au 
 Jupiter MOID = 2.32925 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-August); 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 (A887 DA)          Discovered 1887-Feb-25 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A887 DA = 1933 QN = 1933 RC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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