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JPL Small-Body Database Browser
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49423 (1998 XR77)
Classification: Main-belt Asteroid          SPK-ID: 2049423
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2797470953167082 6.0925e-08  
a 2.556843135236773 1.3281e-08 au
q 1.841573694973821 1.6295e-07 au
i 6.348959136222354 3.4253e-06 deg
node 82.7883505225345 4.4628e-05 deg
peri 292.345723510827 4.5519e-05 deg
M 27.57774344913298 1.0882e-05 deg
tp 2458486.104015582152
(2019-Jan-02.60401558)
4.4439e-05 TDB
period 1493.325748946295
4.09
1.1635e-05
3.185e-08
d
yr
n .2410726529385966 1.8783e-09 deg/d
Q 3.272112575499726 1.6996e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1548  
   data-arc span      7593 days (20.79 yr)  
   first obs. used      1998-12-15  
   last obs. used      2019-09-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49656  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 06:41:14  

Additional Information
 Earth MOID = .853632 au 
 Jupiter MOID = 2.21254 au 
 T_jup = 3.373 
[ 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 15.0   n/a MPO309532  
diameter diameter 2.863 km 0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.384 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.259   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49423 (1998 XR77)          Discovered 1998-Dec-15 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 XR77 = 1999 CL33 = 2001 KX9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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