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49776 (1999 WG18)
Classification: Main-belt Asteroid          SPK-ID: 2049776
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09732569550488203 3.0967e-08  
a 2.23631254416338 6.9515e-09 au
q 2.018661870436387 6.9925e-08 au
i 2.60297427205168 4.0427e-06 deg
node 67.98359264027081 7.7278e-05 deg
peri 310.5610795084028 8.031e-05 deg
M 330.2400381672908 2.1349e-05 deg
tp 2458701.478065371034
(2019-Aug-05.97806537)
7.2466e-05 TDB
period 1221.51042188561
3.34
5.6956e-06
1.559e-08
d
yr
n .2947170925028038 1.3742e-09 deg/d
Q 2.453963217890373 7.6281e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1369  
   data-arc span      7867 days (21.54 yr)  
   first obs. used      1998-05-24  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49164  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:23:56  

Additional Information
 Earth MOID = 1.02093 au 
 Jupiter MOID = 2.93341 au 
 T_jup = 3.630 
[ 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 15.2   n/a MPO452847  
diameter diameter 2.230 km 0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.390   0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49776 (1999 WG18)          Discovered 1999-Nov-28 by Korlevic, K. at Visnjan
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 WG18 = 1998 LH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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