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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1886830793220188 3.4651e-08  
a 2.411151573859677 1.1333e-08 au
q 1.956208070191701 8.4841e-08 au
i 3.811554150211008 4.1941e-06 deg
node 257.6792199006287 6.3581e-05 deg
peri 42.48253435573028 6.4921e-05 deg
M 245.9761974672024 1.566e-05 deg
tp 2459433.639923005247
(2021-Aug-07.13992301)
6.1086e-05 TDB
period 1367.524752009892
3.74
9.6412e-06
2.64e-08
d
yr
n .2632493484822832 1.8559e-09 deg/d
Q 2.866095077527654 1.3471e-08 au
  Orbit Determination Parameters
   # obs. used (total)      866  
   data-arc span      9952 days (27.25 yr)  
   first obs. used      1993-01-22  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58847  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:02:49  

Additional Information
 Earth MOID = .942604 au 
 Jupiter MOID = 2.3536 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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