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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2674901722418736 3.7633e-08  
a 2.419431586886122 7.336e-09 au
q 1.772257414982524 9.1205e-08 au
i 25.64924133543367 5.4411e-06 deg
node 335.5282157790399 8.6723e-06 deg
peri 251.6201229208747 1.285e-05 deg
M 91.39205846833038 9.7564e-06 deg
tp 2458651.540999120360
(2019-Jun-17.04099912)
3.7024e-05 TDB
period 1374.575016933256
3.76
6.2518e-06
1.712e-08
d
yr
n .2618991292328137 1.1912e-09 deg/d
Q 3.066605758789721 9.2983e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2054  
   data-arc span      44126 days (120.81 yr)  
   first obs. used      1899-08-14  
   last obs. used      2020-06-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41136  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:10:27  

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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