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JPL Small-Body Database Browser
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249544 Ianmclean (2010 HQ44)
Classification: Main-belt Asteroid          SPK-ID: 2249544
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1815441101485731 5.9594e-08  
a 3.195570084993058 4.9385e-08 au
q 2.615433157495593 1.7583e-07 au
i 15.54946752087396 6.0968e-06 deg
node 139.3114214828465 2.5253e-05 deg
peri 169.827533604885 3.1345e-05 deg
M 186.7480513012131 1.9295e-05 deg
tp 2459604.645334148412
(2022-Jan-25.14533415)
0.00012321 TDB
period 2086.512290386488
5.71
4.8368e-05
1.324e-07
d
yr
n .1725367263153368 3.9997e-09 deg/d
Q 3.775707012490522 5.8351e-08 au
  Orbit Determination Parameters
   # obs. used (total)      184  
   data-arc span      7559 days (20.70 yr)  
   first obs. used      1998-05-31  
   last obs. used      2019-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57425  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 13:27:49  

Additional Information
 Earth MOID = 1.60183 au 
 Jupiter MOID = 1.55331 au 
 T_jup = 3.113 
[ 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 15.7   n/a MPO433635  
diameter diameter 4.757 km 0.132 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.041   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249544 Ianmclean           Discovered 2010 Apr. 23 at WISE.
Ian McLean (b. 1949) is a professor of astronomy at the University of California Los Angeles. He is an expert in astronomical instrumentation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-01-16Last Updated: 2014-01-21

[ show close-approach data ]
Alternate Designations
 2010 HQ44 = 2008 CH38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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