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190255 (2007 HG)
Classification: Main-belt Asteroid          SPK-ID: 2190255
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1156394503229234 4.697e-08  
a 2.748044196494193 2.2214e-08 au
q 2.430261876148505 1.3021e-07 au
i 5.559329975087619 4.6534e-06 deg
node 83.02102290774702 5.6362e-05 deg
peri 240.8662747008834 5.9989e-05 deg
M 257.4569414450485 2.2404e-05 deg
tp 2459674.455713308565
(2022-Apr-04.95571331)
0.0001051 TDB
period 1663.925956525358
4.56
2.0176e-05
5.524e-08
d
yr
n .2163557810900185 2.6234e-09 deg/d
Q 3.065826516839881 2.4783e-08 au
  Orbit Determination Parameters
   # obs. used (total)      549  
   data-arc span      9241 days (25.30 yr)  
   first obs. used      1995-10-25  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54791  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:06:51  

Additional Information
 Earth MOID = 1.42183 au 
 Jupiter MOID = 2.22375 au 
 T_jup = 3.330 
[ 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 15.73   n/a E2021B55  
diameter diameter 3.848 km 0.386 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.405 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.069   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

190255 (2007 HG)          Discovered 2007-Apr-16 by Yeung, W. K. Y. at 7300
Reference: 20080819/Numbers.arcLast Updated: 2008-08-25
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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