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JPL Small-Body Database Browser
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71222 (1999 YQ9)
Classification: Main-belt Asteroid          SPK-ID: 2071222
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1368347198841501 3.9719e-08  
a 3.074037510157784 2.6841e-08 au
q 2.653402448541973 1.2642e-07 au
i 10.57741178986481 7.1778e-06 deg
node 338.5997006901422 2.266e-05 deg
peri 108.6886562048404 3.4816e-05 deg
M 230.9778649267159 2.6656e-05 deg
tp 2459306.043661083071
(2021-Apr-01.54366108)
0.00014951 TDB
period 1968.621259023785
5.39
2.5784e-05
7.059e-08
d
yr
n .1828691010776342 2.3951e-09 deg/d
Q 3.494672571773594 3.0514e-08 au
  Orbit Determination Parameters
   # obs. used (total)      790  
   data-arc span      7651 days (20.95 yr)  
   first obs. used      1998-09-25  
   last obs. used      2019-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5722  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:39:50  

Additional Information
 Earth MOID = 1.69322 au 
 Jupiter MOID = 1.75521 au 
 T_jup = 3.190 
[ 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 14.2   n/a MPO410530  
diameter diameter 4.910 km 0.173 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.221   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71222 (1999 YQ9)          Discovered 1999-Dec-31 by Kobayashi, T. at Oizumi
Reference: 20031109/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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