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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1244079917172567 4.0809e-08  
a 3.190821620072688 1.8706e-08 au
q 2.793857910391442 1.3386e-07 au
i 13.41749076192949 4.3942e-06 deg
node 18.52947044923972 1.5516e-05 deg
peri 39.98683638086506 2.7438e-05 deg
M 35.95172635580858 1.8559e-05 deg
tp 2459188.592831080701
(2020-Dec-05.09283108)
0.0001079 TDB
period 2081.863331685458
5.70
1.8307e-05
5.012e-08
d
yr
n .1729220139097926 1.5206e-09 deg/d
Q 3.587785329753935 2.1033e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1519  
   data-arc span      10801 days (29.57 yr)  
   first obs. used      1991-10-05  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50241  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:27:25  

Additional Information
 Earth MOID = 1.81858 au 
 Jupiter MOID = 1.92587 au 
 T_jup = 3.142 
[ 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 13.69   n/a MPCxxxxx  
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1995-Jun-24 23:20 < 00:01 Jupiter 1.98577049116487 1.98577000274505 1.98577097958492 2.78644882273542 2.62891707555625 2449893.472075716 0.709231082399171 53.779089850165 8.1005008304054 65.3721353289973 2506092.29999197 T 31 CATAB v2.0g-lin.ifort 2021-Jul-08 17:27:32 2021-Jul-08 17:27
2006-May-26 01:38 < 00:01 Jupiter 1.92434131825198 1.92434086249261 1.92434177401223 3.61601908964976 3.4921725967935 2453881.568185724 0.393476249229148 114.253272174294 12.9788969765074 81.9059094882116 2967048.53192169 T 31 CATAB v2.0g-lin.ifort 2021-Jul-08 17:27:32 2021-Jul-08 17:27
2017-May-26 18:07 < 00:01 Jupiter 1.96690835315257 1.96690781002321 1.9669088962836 4.16612607317811 4.06144475227818 2457900.254714160 0.319450835466548 170.973269631278 19.6911810872457 84.8252578292888 3248588.34638752 T 31 CATAB v2.0g-lin.ifort 2021-Jul-08 17:27:32 2021-Jul-08 17:27
2137-Apr-11 10:30 00:03 Jupiter 1.9481575760289 1.94815703961977 1.94815811243948 3.19893206312139 3.06000060720777 2501683.937582780 2.72305549275955 115.513640311807 10.9857722765647 73.4014387087298 2214405.3752374 T 31 CATAB v2.0g-lin.ifort 2021-Jul-08 17:27:32 2021-Jul-08 17:27
2148-Mar-31 11:29 00:03 Jupiter 1.95422920025226 1.95422857512876 1.95422982537832 3.964407658137 3.85352658078376 2505690.978166116 2.77682492499003 161.78418882239 17.5500340327774 82.9309586570229 2238998.99373288 T 31 CATAB v2.0g-lin.ifort 2021-Jul-08 17:27:32 2021-Jul-08 17:27

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