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JPL Small-Body Database Browser
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49979 (1999 YB8)
Classification: Main-belt Asteroid          SPK-ID: 2049979
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09744196401541262 4.0084e-08  
a 2.24953077440325 7.8284e-09 au
q 2.030332077632285 9.0505e-08 au
i 2.35380660214605 3.3765e-06 deg
node 258.964913215609 0.0001044 deg
peri 293.4248976257893 0.00010601 deg
M 167.3045202192928 2.0087e-05 deg
tp 2458027.781107975873
(2017-Oct-01.28110798)
6.773e-05 TDB
period 1232.356429213263
3.37
6.4329e-06
1.761e-08
d
yr
n .2921232781897558 1.5249e-09 deg/d
Q 2.468729471174215 8.5912e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1373  
   data-arc span      8817 days (24.14 yr)  
   first obs. used      1995-10-17  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49676  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:25:25  

Additional Information
 Earth MOID = 1.03132 au 
 Jupiter MOID = 2.49612 au 
 T_jup = 3.621 
[ 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 14.8   n/a MPO280015  
diameter diameter 2.571 km 0.291 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.386   0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49979 (1999 YB8)          Discovered 1999-Dec-27 by Spacewatch at Kitt Peak
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 YB8 = 1998 QX12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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