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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03227614533412317 4.8004e-08  
a 3.081284401529566 2.2986e-08 au
q 2.981832418370031 1.5717e-07 au
i 9.89377001058644 5.6343e-06 deg
node 214.4514924755364 2.5348e-05 deg
peri 297.1444548780839 8.8681e-05 deg
M 329.2831847214132 8.5723e-05 deg
tp 2459565.065925830601
(2021-Dec-16.56592583)
0.00047044 TDB
period 1975.586751056184
5.41
2.2107e-05
6.053e-08
d
yr
n .1822243441385389 2.0391e-09 deg/d
Q 3.180736384689101 2.3728e-08 au
  Orbit Determination Parameters
   # obs. used (total)      968  
   data-arc span      8149 days (22.31 yr)  
   first obs. used      1998-11-11  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50434  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:22:33  

Additional Information
 Earth MOID = 2.0042 au 
 Jupiter MOID = 1.82717 au 
 T_jup = 3.204 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457458.5 (2016-Mar-11.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03074960935935805 4.9538e-08  
q 2.985604964351252 1.6186e-07 au
tp 2457620.476919246346
(2016-Aug-19.97691925)
0.00047997 TDB
node 214.515625428486 2.5385e-05 deg
peri 302.7576765006686 9.0183e-05 deg
i 9.884600880030064 5.6333e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      968  
   data-arc span      8149 days (22.31 yr)  
   first obs. used      1998-11-11  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50434  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:22:33  

Additional Information
 Jupiter MOID = 1.82717 au 
 T_jup = 3.204 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.453971826480067E-15 -7.951219924481252E-15 4.334275220682533E-12 7.295600943247095E-15 8.394404369708619E-13 2.805715092547574E-15
q -7.951219924481252E-15 2.619779127253185E-14 -1.383257400902998E-11 -2.414977470749317E-14 -2.690320724326096E-12 -7.645551179648482E-15
tp 4.334275220682533E-12 -1.383257400902998E-11 2.303734806748991E-7 -1.038091811884081E-10 4.155096178673082E-8 3.991475332481094E-11
node 7.295600943247095E-15 -2.414977470749317E-14 -1.038091811884081E-10 6.443938086409999E-10 -6.532051154258683E-10 -1.826620799316623E-11
peri 8.394404369708619E-13 -2.690320724326096E-12 4.155096178673082E-8 -6.532051154258683E-10 8.13300150719797E-9 2.514366813226492E-11
i 2.805715092547574E-15 -7.645551179648482E-15 3.991475332481094E-11 -1.826620799316623E-11 2.514366813226492E-11 3.17341993716165E-11

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 14.38   n/a MPCxxxxx  
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. 2020-October); 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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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