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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1239681405699288 4.2282e-08  
a 3.189231695738015 2.4433e-08 au
q 2.793868572570692 1.4233e-07 au
i 13.41926902333046 5.9566e-06 deg
node 18.53690365246294 2.035e-05 deg
peri 39.96314541296725 3.3036e-05 deg
M 327.4631000609116 2.4859e-05 deg
tp 2459188.518769139237
(2020-Dec-05.01876914)
0.00014416 TDB
period 2080.307497544035
5.70
2.3906e-05
6.545e-08
d
yr
n .1730513399701766 1.9886e-09 deg/d
Q 3.584594818905337 2.7461e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1091  
   data-arc span      10527 days (28.82 yr)  
   first obs. used      1991-10-05  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55662  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:59:38  

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

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