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74027 (1998 HG18)
Classification: Main-belt Asteroid          SPK-ID: 2074027
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1884276011238264 3.5723e-08  
a 2.411733856555063 1.1697e-08 au
q 1.957296631415278 8.687e-08 au
i 3.81166452435484 4.7745e-06 deg
node 257.6818291659766 6.6002e-05 deg
peri 42.42012755879945 6.7492e-05 deg
M 140.7745585133025 1.5724e-05 deg
tp 2458065.548794703575
(2017-Nov-08.04879470)
5.8364e-05 TDB
period 1368.020158901902
3.75
9.9528e-06
2.725e-08
d
yr
n .2631540168888805 1.9145e-09 deg/d
Q 2.866171081694848 1.3902e-08 au
  Orbit Determination Parameters
   # obs. used (total)      777  
   data-arc span      9514 days (26.05 yr)  
   first obs. used      1993-01-22  
   last obs. used      2019-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60028  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:10:26  

Additional Information
 Earth MOID = .94294 au 
 Jupiter MOID = 2.35145 au 
 T_jup = 3.492 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7   n/a MPO417337  
diameter diameter 1.662 km 0.283 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.403   0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74027 (1998 HG18)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HG18 = 1999 VU147 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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