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1213 Algeria (1931 XD)
Classification: Main-belt Asteroid          SPK-ID: 2001213
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .128149714207276 3.4985e-08  
a 3.136811814266569 1.3752e-08 au
q 2.734830276746301 1.1031e-07 au
i 13.10848722476631 4.0065e-06 deg
node 271.2951203212349 1.8422e-05 deg
peri 110.2912055246059 2.5298e-05 deg
M 54.78511137634993 1.639e-05 deg
tp 2458891.690130049091
(2020-Feb-12.19013005)
9.2498e-05 TDB
period 2029.229299519478
5.56
1.3345e-05
3.654e-08
d
yr
n .1774072551018498 1.1667e-09 deg/d
Q 3.538793351786837 1.5515e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2707  
   data-arc span      32575 days (89.19 yr)  
   first obs. used      1931-11-16  
   last obs. used      2021-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37464  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:53:34  

Additional Information
 Earth MOID = 1.77244 au 
 Jupiter MOID = 1.99628 au 
 T_jup = 3.159 
[ 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 11.18   n/a E2021B10  
diameter diameter 29.175 km 0.251 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.3722 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.057   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1213 Algeria (1931 XD)          Discovered 1931-Dec-05 by Reiss, G. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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