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4803 Birkle (1989 XA)
Classification: Main-belt Asteroid          SPK-ID: 2004803
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03519753550727965 4.9915e-08  
a 2.90269872778699 1.5263e-08 au
q 2.800530886248772 1.4696e-07 au
i 2.918732140157065 4.8211e-06 deg
node 46.09974748232252 9.618e-05 deg
peri 182.6429158316505 0.00012646 deg
M 258.5204388532558 8.4513e-05 deg
tp 2459509.687167897668
(2021-Oct-22.18716790)
0.0004248 TDB
period 1806.347784437985
4.95
1.4248e-05
3.901e-08
d
yr
n .1992971691838446 1.572e-09 deg/d
Q 3.004866569325208 1.5801e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2208  
   data-arc span      25337 days (69.37 yr)  
   first obs. used      1950-12-09  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42266  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:12:48  

Additional Information
 Earth MOID = 1.78996 au 
 Jupiter MOID = 1.9642 au 
 T_jup = 3.284 
[ 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 12.4   n/a MPO502199  
diameter diameter 10.062 km 0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.576 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.230   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4803 Birkle (1989 XA)          Discovered 1989-Dec-01 by Baur, J. M. at Chions
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 XA = 1969 UL = 1981 EG49 = 1982 KQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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