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JPL Small-Body Database Browser
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49652 (1999 JW81)
Classification: Main-belt Asteroid          SPK-ID: 2049652
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08243011478474603 4.0808e-08  
a 2.418143894004477 1.0172e-08 au
q 2.218816015255655 1.0196e-07 au
i 12.5219701739545 4.5396e-06 deg
node 69.24475057352092 1.8305e-05 deg
peri 11.45308070051842 3.2743e-05 deg
M 239.1488347605938 2.736e-05 deg
tp 2459061.573305579699
(2020-Jul-31.07330558)
0.00010556 TDB
period 1373.477778885064
3.76
8.6668e-06
2.373e-08
d
yr
n .2621083540879955 1.6539e-09 deg/d
Q 2.617471772753299 1.1011e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1380  
   data-arc span      25426 days (69.61 yr)  
   first obs. used      1950-04-20  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48149  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:22:55  

Additional Information
 Earth MOID = 1.23508 au 
 Jupiter MOID = 2.62067 au 
 T_jup = 3.478 
[ 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 14.1   n/a MPO302340  
diameter diameter 3.158 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.798 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.406   0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49652 (1999 JW81)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JW81 = 2001 VD81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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