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49027 (1998 QA99)
Classification: Main-belt Asteroid          SPK-ID: 2049027
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391970236570943 3.7798e-08  
a 2.337131338160927 8.314e-09 au
q 2.011809611993204 8.9029e-08 au
i 4.988648269693478 4.7248e-06 deg
node 149.5578628860567 4.99e-05 deg
peri 159.732603636478 5.2778e-05 deg
M 60.48999122745058 1.7665e-05 deg
tp 2458781.217423256049
(2019-Oct-24.71742326)
6.3704e-05 TDB
period 1305.037842227333
3.57
6.9637e-06
1.907e-08
d
yr
n .2758540697835866 1.472e-09 deg/d
Q 2.66245306432865 9.4713e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1225  
   data-arc span      8103 days (22.18 yr)  
   first obs. used      1998-08-23  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52488  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:34:39  

Additional Information
 Earth MOID = .998236 au 
 Jupiter MOID = 2.57896 au 
 T_jup = 3.549 
[ 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 14.9   n/a MPO493203  
diameter diameter 2.901 km 0.662 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.303   0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49027 (1998 QA99)          Discovered 1998-Aug-26 by Elst, E. W. at La Silla
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 QA99 = 2001 HJ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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