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19741 Callahan (2000 AN141)
Classification: Main-belt Asteroid          SPK-ID: 2019741
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1307414724352903 1.7861e-08  
a 2.247183061381653 6.501e-09 au
q 1.953383039104972 4.1544e-08 au
i 8.049369782375816 4.7548e-07 deg
node 167.3358571701295 3.3976e-06 deg
peri 227.5658219821931 7.7826e-06 deg
M 154.4828908403649 6.906e-06 deg
tp 2458672.499914527668
(2019-Jul-07.99991453)
2.3086e-05 TDB
period 1230.427717503415
3.37
5.3393e-06
1.462e-08
d
yr
n .2925811852893348 1.2696e-09 deg/d
Q 2.540983083658334 7.3509e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1695  
   data-arc span      15535 days (42.53 yr)  
   first obs. used      1978-09-02  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:05:13  

Additional Information
 Earth MOID = .967164 au 
 Jupiter MOID = 2.89688 au 
 T_jup = 3.606 
[ 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 14.43   n/a E2021B10  
diameter diameter 3.876 km 0.166 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.268 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 0.224   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19741 Callahan           Discovered 2000 Jan. 5 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Diane Callahan mentored a finalist in the 2003 Discovery Channel Youth Science Challenge, a middle school science competition. She teaches at the Fairfield Middle School, Fairfield, Ohio.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031010/MPCPages.arcLast Updated: 2003-10-10

Alternate Designations
 2000 AN141 = 1978 RQ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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