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49460 (1999 AT4)
Classification: Main-belt Asteroid          SPK-ID: 2049460
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04903935471004868 4.7583e-08  
a 3.086119735721618 2.2543e-08 au
q 2.934778415323884 1.4623e-07 au
i 10.51356060389699 4.1117e-06 deg
node 103.9453826132472 2.9763e-05 deg
peri 231.4860770872591 5.4665e-05 deg
M 60.8401748206664 4.6349e-05 deg
tp 2458265.838666504834
(2018-May-27.33866650)
0.00025528 TDB
period 1980.238886778075
5.42
2.1698e-05
5.941e-08
d
yr
n .1817962481212224 1.9919e-09 deg/d
Q 3.237461056119352 2.3649e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1346  
   data-arc span      7662 days (20.98 yr)  
   first obs. used      1998-12-14  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49983  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:20:00  

Additional Information
 Earth MOID = 1.93494 au 
 Jupiter MOID = 1.9972 au 
 T_jup = 3.199 
[ 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 MPO502485  
diameter diameter 6.306 km 0.460 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.256   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49460 (1999 AT4)          Discovered 1999-Jan-11 by Kobayashi, T. at Oizumi
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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