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JPL Small-Body Database Browser
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49918 (1999 XX172)
Classification: Main-belt Asteroid          SPK-ID: 2049918
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1541329437035996 4.7761e-08  
a 2.548002276869906 1.4886e-08 au
q 2.155271185372473 1.2179e-07 au
i 3.234424291857808 5.0992e-06 deg
node 33.34101048720741 6.0485e-05 deg
peri 181.7841886820614 6.1507e-05 deg
M 178.0733694878066 1.1034e-05 deg
tp 2457865.656900732155
(2017-Apr-22.15690073)
4.528e-05 TDB
period 1485.587185199743
4.07
1.3018e-05
3.564e-08
d
yr
n .2423284231221991 2.1236e-09 deg/d
Q 2.940733368367338 1.718e-08 au
  Orbit Determination Parameters
   # obs. used (total)      943  
   data-arc span      8193 days (22.43 yr)  
   first obs. used      1997-06-29  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50255  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:25:10  

Additional Information
 Earth MOID = 1.14874 au 
 Jupiter MOID = 2.02778 au 
 T_jup = 3.423 
[ 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 15.0   n/a MPO502489  

49918 (1999 XX172)          Discovered 1999-Dec-10 by LINEAR at Socorro
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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