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JPL Small-Body Database Browser
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927 Ratisbona (A920 DB)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000927
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08701678755679032 4.9961e-08  
a 3.228529982061194 1.4149e-08 au
q 2.947593674491447 1.6495e-07 au
i 14.57244402349686 5.0875e-06 deg
node 7.68871748480994 1.695e-05 deg
peri 171.3627644910813 3.1757e-05 deg
M 88.007373033992 2.4264e-05 deg
tp 2458482.508993248637
(2018-Dec-30.00899325)
0.0001444 TDB
period 2118.876589561032
5.80
1.3929e-05
3.814e-08
d
yr
n .1699013532801272 1.1169e-09 deg/d
Q 3.509466289630941 1.538e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2418  
   data-arc span      36368 days (99.57 yr)  
   first obs. used      1920-02-17  
   last obs. used      2019-09-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39308  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:59:05  

Additional Information
 Earth MOID = 1.95118 au 
 Jupiter MOID = 1.44925 au 
 T_jup = 3.131 
[ 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 9.3   n/a MPO492760 IRAS observations used: 18
diameter diameter 75.892 km 0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.986 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Polakis, T. (2018) Minor Planet Bull. 45, 269-273.]
geometric albedo albedo 0.046   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.722   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.54 deg.
U-B UB 0.401   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.54 deg.
Tholen spectral type spec_T CB:   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

927 Ratisbona (A920 DB)          Discovered 1920-Feb-16 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A920 DB = 1958 VD = 1958 XQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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