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JPL Small-Body Database Browser
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44613 Rudolf (1999 RU31)
Classification: Main-belt Asteroid          SPK-ID: 2044613
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02417489456012559 3.9731e-08  
a 2.420575409079964 1.1748e-08 au
q 2.362058253790623 9.6797e-08 au
i 7.813847791874559 4.5785e-06 deg
node 220.5463262274218 3.1907e-05 deg
peri 80.46060425799149 0.00011372 deg
M 239.843979028531 0.00011099 deg
tp 2459459.612787840584
(2021-Sep-02.11278784)
0.00042502 TDB
period 1375.549908246847
3.77
1.0014e-05
2.742e-08
d
yr
n .2617135138766604 1.9052e-09 deg/d
Q 2.479092564369305 1.2032e-08 au
  Orbit Determination Parameters
   # obs. used (total)      826  
   data-arc span      7923 days (21.69 yr)  
   first obs. used      1998-05-24  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52136  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 07:48:52  

Additional Information
 Earth MOID = 1.36114 au 
 Jupiter MOID = 2.55064 au 
 T_jup = 3.501 
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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 15.5   n/a MPO452782  
diameter diameter 3.775 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.094   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

44613 Rudolf           Discovered 1999 Sept. 8 by P. Pravec and P. Kušnirák at Ondřejov.
Rudolf II (1552-1612), of the Habsburg dynasty, was a Czech and Hungarian king and Roman emperor. He created an important center for arts and sciences in Prague, assembled a great artistic collection and employed Tycho Brahe and Johannes Kepler as his court astronomers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031110/MPCPages.arcLast Updated: 2003-11-12

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Alternate Designations
 1999 RU31 = 2001 BS48 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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