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46242 (2001 HQ12)
Classification: Main-belt Asteroid          SPK-ID: 2046242
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03227021901246731 5.5525e-08  
a 3.079954143227139 2.4874e-08 au
q 2.980563348476843 1.749e-07 au
i 9.89586692853492 6.9132e-06 deg
node 214.4644568335575 2.8576e-05 deg
peri 297.9311751051658 0.00010571 deg
M 256.3168222282678 0.00010454 deg
tp 2459569.117996918543
(2021-Dec-20.61799692)
0.00057482 TDB
period 1974.30753271612
5.41
2.3917e-05
6.548e-08
d
yr
n .1823424132433593 2.2089e-09 deg/d
Q 3.179344937977435 2.5677e-08 au
  Orbit Determination Parameters
   # obs. used (total)      775  
   data-arc span      7686 days (21.04 yr)  
   first obs. used      1998-11-11  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52891  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 03:53:06  

Additional Information
 Earth MOID = 2.00162 au 
 Jupiter MOID = 1.82962 au 
 T_jup = 3.204 
[ 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 14.4   n/a MPO493178  
diameter diameter 4.893 km 0.318 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.86 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 [Result based on fragmentary lightcurve(s), may be completely wrong.]
geometric albedo albedo 0.185   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46242 (2001 HQ12)          Discovered 2001-Apr-18 by LINEAR at Socorro
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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