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JPL Small-Body Database Browser
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960 Birgit (A921 TG)
Classification: Main-belt Asteroid          SPK-ID: 2000960
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1652574082375035 3.0386e-08  
a 2.248649701822858 5.306e-09 au
q 1.877043680065578 6.7536e-08 au
i 3.025991229731843 3.5435e-06 deg
node 249.1566793192716 6.0831e-05 deg
peri 88.04047499721095 6.1875e-05 deg
M 123.6214196507927 1.2965e-05 deg
tp 2458577.566232379423
(2019-Apr-04.06623238)
4.3625e-05 TDB
period 1231.632485482715
3.37
4.3593e-06
1.194e-08
d
yr
n .2922949859177389 1.0346e-09 deg/d
Q 2.620255723580139 6.1829e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2701  
   data-arc span      35918 days (98.34 yr)  
   first obs. used      1921-10-01  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42319  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:41:45  

Additional Information
 Earth MOID = .870673 au 
 Jupiter MOID = 2.75155 au 
 T_jup = 3.609 
[ 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 12.5   n/a MPO452171  
diameter diameter 7.506 km 0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.85 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:
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
geometric albedo albedo 0.217   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

960 Birgit (A921 TG)          Discovered 1921-Oct-01 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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