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25555 Ratnavarma (1999 XJ169)
Classification: Main-belt Asteroid          SPK-ID: 2025555
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1189644916451201 3.5299e-08  
a 2.813459111025558 1.3376e-08 au
q 2.478757378118071 9.7927e-08 au
i 6.083308554277166 5.3738e-06 deg
node 41.57287205344964 3.5321e-05 deg
peri 59.84454007736702 4.2061e-05 deg
M 107.1474121694103 2.2388e-05 deg
tp 2458487.475005749714
(2019-Jan-03.97500575)
0.00010649 TDB
period 1723.690700416468
4.72
1.2292e-05
3.365e-08
d
yr
n .2088541754695428 1.4894e-09 deg/d
Q 3.148160843933044 1.4967e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1325  
   data-arc span      11221 days (30.72 yr)  
   first obs. used      1989-09-26  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54107  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 19:22:18  

Additional Information
 Earth MOID = 1.50236 au 
 Jupiter MOID = 2.01668 au 
 T_jup = 3.301 
[ 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 14.1   n/a MPO290654  
diameter diameter 6.179 km 0.196 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.116   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

25555 Ratnavarma           Discovered 1999 Dec. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Ratna Varma (b. 1992) was awarded second place in the 2009 Intel International Science and Engineering Fair for her medicine and health sciences project. She attends the A. B. Lucas Secondary School, London, Ontario, Canada.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100428/MPCPages.arcLast Updated: 2010-06-03

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Alternate Designations
 1999 XJ169 = 1989 SG3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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