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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08622027835224205 4.9644e-08  
a 3.223558515914966 1.4201e-08 au
q 2.945622403388037 1.6397e-07 au
i 14.58220630207841 5.0899e-06 deg
node 7.780245273874566 1.6944e-05 deg
peri 170.4312358577336 3.2112e-05 deg
M 20.82237254286123 2.485e-05 deg
tp 2458478.227307475832
(2018-Dec-25.72730748)
0.00014629 TDB
period 2113.984331905148
5.79
1.397e-05
3.825e-08
d
yr
n .1702945450288951 1.1253e-09 deg/d
Q 3.501494628441894 1.5426e-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 = 1.94997 au 
 Jupiter MOID = 1.45896 au 
 T_jup = 3.132 
[ 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 9.54   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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-January); 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

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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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