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JPL Small-Body Database Browser
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39973 (1998 HX)
Classification: Main-belt Asteroid          SPK-ID: 2039973
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1010871863263283 3.406e-08  
a 2.391832365515485 9.3341e-09 au
q 2.150048761521278 7.9368e-08 au
i 4.332219235813218 3.6281e-06 deg
node 113.1270647933486 4.9737e-05 deg
peri 194.0804108042614 5.4303e-05 deg
M 157.6236273826953 2.4333e-05 deg
tp 2458008.920179503826
(2017-Sep-12.42017950)
8.9584e-05 TDB
period 1351.121902946407
3.70
7.9091e-06
2.165e-08
d
yr
n .2664452402221767 1.5597e-09 deg/d
Q 2.633615969509691 1.0278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1955  
   data-arc span      9859 days (26.99 yr)  
   first obs. used      1992-11-27  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50685  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 02:34:09  

Additional Information
 Earth MOID = 1.13458 au 
 Jupiter MOID = 2.55498 au 
 T_jup = 3.521 
[ 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 MPO324669  
diameter diameter 4.527 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.313   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39973 (1998 HX)          Discovered 1998-Apr-17 by Spacewatch at Kitt Peak
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HX = 1992 WQ5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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