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49904 (1999 XN165)
Classification: Main-belt Asteroid          SPK-ID: 2049904
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06685928937437505 2.8887e-08  
a 2.477033249215883 9.9614e-09 au
q 2.31142056641661 6.8599e-08 au
i 10.64266250572437 4.2904e-06 deg
node 82.22223329534398 2.1006e-05 deg
peri 64.97500263339423 4.9665e-05 deg
M 71.13441064264657 4.4046e-05 deg
tp 2458719.132832872104
(2019-Aug-23.63283287)
0.00017394 TDB
period 1423.954725300217
3.90
8.5897e-06
2.352e-08
d
yr
n .2528170268363694 1.5251e-09 deg/d
Q 2.642645932015156 1.0627e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2273  
   data-arc span      10920 days (29.90 yr)  
   first obs. used      1990-09-24  
   last obs. used      2020-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44025  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:14  

Additional Information
 Earth MOID = 1.34693 au 
 Jupiter MOID = 2.41722 au 
 T_jup = 3.454 
[ 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 13.7   n/a MPO502489  
diameter diameter 5.232 km 0.630 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 10.441 h n/a LCDB (Rev. 2020-October); 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.282   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

49904 (1999 XN165)          Discovered 1999-Dec-08 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 XN165 = 1998 SX164 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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