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JPL Small-Body Database Browser
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71084 (1999 XQ121)
Classification: Main-belt Asteroid          SPK-ID: 2071084
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 .08837025193424705 6.3744e-08  
a 2.762197314455697 1.4575e-08 au
q 2.518101241885147 1.7589e-07 au
i 3.534006561184448 6.3871e-06 deg
node 20.62056901264329 6.646e-05 deg
peri 10.18432471363331 7.256e-05 deg
M 109.6403219816036 2.7132e-05 deg
tp 2458089.820674145922
(2017-Dec-02.32067415)
0.00012647 TDB
period 1676.79694828254
4.59
1.3272e-05
3.634e-08
d
yr
n .2146950472260402 1.6993e-09 deg/d
Q 3.006293387026248 1.5863e-08 au
  Orbit Determination Parameters
   # obs. used (total)      944  
   data-arc span      8967 days (24.55 yr)  
   first obs. used      1994-10-08  
   last obs. used      2019-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52677  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:33:26  

Additional Information
 Earth MOID = 1.52273 au 
 Jupiter MOID = 2.38298 au 
 T_jup = 3.333 
[ 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 14.8   n/a MPO337798  
diameter diameter 3.329 km 0.957 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.175   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71084 (1999 XQ121)          Discovered 1999-Dec-05 by CSS at Catalina
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XQ121 = 2001 BY65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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