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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03246082111006227 5.5838e-08  
a 3.078939336350405 2.5232e-08 au
q 2.978994437344401 1.7564e-07 au
i 9.897232305358623 6.9274e-06 deg
node 214.4618633771577 2.913e-05 deg
peri 298.5020481591235 0.00010533 deg
M 182.7777134059204 0.00010375 deg
tp 2459571.939950938630
(2021-Dec-23.43995094)
0.00057106 TDB
period 1973.331848149112
5.40
2.4257e-05
6.641e-08
d
yr
n .1824325697361354 2.2426e-09 deg/d
Q 3.17888423535641 2.6051e-08 au
  Orbit Determination Parameters
   # obs. used (total)      769  
   data-arc span      7656 days (20.96 yr)  
   first obs. used      1998-11-11  
   last obs. used      2019-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .529  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 06:26:06  

Additional Information
 Earth MOID = 2.00018 au 
 Jupiter MOID = 1.8306 au 
 T_jup = 3.205 
[ 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 14.3   n/a MPO319637  
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-January); 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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