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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06711278760554841 3.3816e-08  
a 2.477467140089585 1.1591e-08 au
q 2.311197414117027 8.4353e-08 au
i 10.64282288613863 4.5615e-06 deg
node 82.22295431867958 2.2603e-05 deg
peri 64.9168865229245 5.0576e-05 deg
M 330.0612634899128 4.402e-05 deg
tp 2458718.951686509574
(2019-Aug-23.45168651)
0.00017426 TDB
period 1424.328883387552
3.90
9.996e-06
2.737e-08
d
yr
n .2527506141304908 1.7738e-09 deg/d
Q 2.643736866062143 1.2369e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1795  
   data-arc span      10666 days (29.20 yr)  
   first obs. used      1990-09-24  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47492  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:24:51  

Additional Information
 Earth MOID = 1.34713 au 
 Jupiter MOID = 2.41781 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. 2019-January); 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

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