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49638 (1999 HK9)
Classification: Main-belt Asteroid          SPK-ID: 2049638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09357476161043833 3.478e-08  
a 3.036789538098834 2.0091e-08 au
q 2.752622681010163 1.0772e-07 au
i 9.091036426217013 5.7211e-06 deg
node 210.1696066486018 2.4922e-05 deg
peri 263.295724693505 3.8985e-05 deg
M 4.096286143306648 3.0227e-05 deg
tp 2458578.505795723528
(2019-Apr-05.00579572)
0.00016225 TDB
period 1932.949325932195
5.29
1.9182e-05
5.252e-08
d
yr
n .1862438891544063 1.8482e-09 deg/d
Q 3.320956395187506 2.1971e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1228  
   data-arc span      9087 days (24.88 yr)  
   first obs. used      1994-05-14  
   last obs. used      2019-03-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56747  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:51:29  

Additional Information
 Earth MOID = 1.78824 au 
 Jupiter MOID = 1.86223 au 
 T_jup = 3.216 
[ 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 13.6   n/a MPO253680  
diameter diameter 11.240 km 0.222 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49638 (1999 HK9)          Discovered 1999-Apr-17 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 HK9 = 2001 QZ173 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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