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49973 (1999 YQ)
Classification: Main-belt Asteroid          SPK-ID: 2049973
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2454636926880888 4.7518e-08  
a 2.299167127139764 1.3676e-08 au
q 1.734805074004973 1.0957e-07 au
i 23.49045750646397 5.4904e-06 deg
node 249.4982304954367 1.3676e-05 deg
peri 230.6559607437394 1.8564e-05 deg
M 188.5223830013858 1.7628e-05 deg
tp 2459207.039624088703
(2020-Dec-23.53962409)
6.6183e-05 TDB
period 1273.368900815188
3.49
1.1361e-05
3.11e-08
d
yr
n .2827146161411154 2.5224e-09 deg/d
Q 2.863529180274555 1.7033e-08 au
  Orbit Determination Parameters
   # obs. used (total)      727  
   data-arc span      15786 days (43.22 yr)  
   first obs. used      1976-06-29  
   last obs. used      2019-09-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49584  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:17:30  

Additional Information
 Earth MOID = .816672 au 
 Jupiter MOID = 2.52582 au 
 T_jup = 3.445 
[ 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 14.4   n/a MPO395474  
diameter diameter 3.448 km 0.896 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.294   0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

49973 (1999 YQ)          Discovered 1999-Dec-16 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 YQ = 1990 HW2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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