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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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2674901751644003 3.7203e-08  
a 2.419431586211202 7.1411e-09 au
q 1.772257407417284 8.9974e-08 au
i 25.64924182534884 5.3632e-06 deg
node 335.5282145231716 8.3983e-06 deg
peri 251.6201251151649 1.2424e-05 deg
M 91.39205813362528 9.7038e-06 deg
tp 2458651.541000544370
(2019-Jun-17.04100054)
3.6783e-05 TDB
period 1374.575016358083
3.76
6.0857e-06
1.666e-08
d
yr
n .2618991293424021 1.1595e-09 deg/d
Q 3.066605765005119 9.0513e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2305  
   data-arc span      44233 days (121.10 yr)  
   first obs. used      1899-08-14  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39167  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:24:40  

Additional Information
 Earth MOID = .912158 au 
 Jupiter MOID = 2.32925 au 
 T_jup = 3.335 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456232.5 (2012-Nov-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2681077082885627 3.7131e-08  
q 1.770586637333414 8.9795e-08 au
tp 2455901.680468375089
(2011-Dec-06.18046838)
3.6853e-05 TDB
node 335.6023423703664 8.4057e-06 deg
peri 251.6291643605215 1.2408e-05 deg
i 25.63789023990737 5.3612e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2305  
   data-arc span      44233 days (121.10 yr)  
   first obs. used      1899-08-14  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39167  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:24:40  

Additional Information
 Jupiter MOID = 2.32925 au 
 T_jup = 3.335 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.378724976034964E-15 -3.328596063216171E-15 -6.445872119725849E-13 3.832641236391252E-15 -1.474230984708133E-13 -5.261639748581346E-15
q -3.328596063216171E-15 8.063141884122475E-15 1.523705583281612E-12 -9.219663866012735E-15 3.496496965379089E-13 1.340379733974709E-14
tp -6.445872119725849E-13 1.523705583281612E-12 1.358145785251074E-9 -1.943949394115197E-12 3.455998992035406E-10 8.662456724488119E-12
node 3.832641236391252E-15 -9.219663866012735E-15 -1.943949394115197E-12 7.065619754996778E-11 -6.35586411037991E-11 8.51176746734334E-12
peri -1.474230984708133E-13 3.496496965379089E-13 3.455998992035406E-10 -6.35586411037991E-11 1.539585733377175E-10 -5.556443850737558E-12
i -5.261639748581346E-15 1.340379733974709E-14 8.662456724488119E-12 8.51176746734334E-12 -5.556443850737558E-12 2.874239816218387E-11

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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