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JPL Small-Body Database Browser
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15461 Johnbird (1998 YT29)
Classification: Main-belt Asteroid          SPK-ID: 2015461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1239680935260756 4.2282e-08  
a 3.189231696713056 2.4917e-08 au
q 2.793868723458607 1.425e-07 au
i 13.41926142678655 5.9778e-06 deg
node 18.53690140290952 2.0692e-05 deg
peri 39.96314154267629 3.3494e-05 deg
M 327.4630991658425 2.5368e-05 deg
tp 2459188.518774397737
(2020-Dec-05.01877440)
0.00014717 TDB
period 2080.30749849805
5.70
2.438e-05
6.675e-08
d
yr
n .1730513398908164 2.0281e-09 deg/d
Q 3.584594669967505 2.8006e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1080  
   data-arc span      10277 days (28.14 yr)  
   first obs. used      1991-10-05  
   last obs. used      2019-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56005  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 23:21:42  

Additional Information
 Earth MOID = 1.81904 au 
 Jupiter MOID = 1.92664 au 
 T_jup = 3.143 
[ 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 13.5   n/a MPO412297  
diameter diameter 6.663 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.190   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15461 Johnbird           Discovered 1998 Dec. 27 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
John M. Bird (b. 1931) is a professor of geology at Cornell University. He is a pioneer in the geological interpretation of plate-tectonic motions and of deep-earth mineralogy. The name was suggested by P. C. Thomas.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040928/MPCPages.arcLast Updated: 2004-09-28

[ show close-approach data ]
Alternate Designations
 1998 YT29 = 2000 GV42 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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