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49004 (1998 QK61)
Classification: Main-belt Asteroid          SPK-ID: 2049004
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03672138408964169 2.8905e-08  
a 2.285353337177593 7.1699e-09 au
q 2.20143199950255 6.6578e-08 au
i 6.826434252769207 3.3895e-06 deg
node 157.9068215712862 2.7121e-05 deg
peri 339.1847812285415 5.8324e-05 deg
M 315.9843587530742 5.3041e-05 deg
tp 2459154.788299635453
(2020-Nov-01.28829964)
0.00018622 TDB
period 1261.910227711208
3.45
5.9386e-06
1.626e-08
d
yr
n .285281783200181 1.3425e-09 deg/d
Q 2.369274674852635 7.4332e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1719  
   data-arc span      8113 days (22.21 yr)  
   first obs. used      1998-08-03  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50635  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:34:46  

Additional Information
 Earth MOID = 1.21497 au 
 Jupiter MOID = 2.61531 au 
 T_jup = 3.592 
[ 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 14.6   n/a MPO502482  
diameter diameter 2.683 km 0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.426   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49004 (1998 QK61)          Discovered 1998-Aug-26 by LONEOS at Anderson Mesa
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 QK61 = 2000 AD128 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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