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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1306053711882016 3.3339e-08  
a 2.24750724245549 7.2505e-09 au
q 1.95397072480642 7.5508e-08 au
i 8.048608189072242 4.8065e-06 deg
node 167.3360713828307 2.3638e-05 deg
peri 227.6095591806183 2.9585e-05 deg
M 95.93351746929159 1.7985e-05 deg
tp 2458672.542215108572
(2019-Jul-08.04221511)
6.1002e-05 TDB
period 1230.693981367949
3.37
5.9554e-06
1.63e-08
d
yr
n .2925178845839893 1.4155e-09 deg/d
Q 2.541043760104561 8.1975e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1576  
   data-arc span      15128 days (41.42 yr)  
   first obs. used      1978-09-02  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47502  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:54:54  

Additional Information
 Earth MOID = .968971 au 
 Jupiter MOID = 2.89588 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 14.4   n/a MPO449096  
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. 2019-August); 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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