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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1371871240664247 3.966e-08  
a 3.073660754643708 2.6512e-08 au
q 2.651994075358302 1.2634e-07 au
i 10.57873499017124 7.1771e-06 deg
node 338.5963205428347 2.2406e-05 deg
peri 108.7247440455468 3.4539e-05 deg
M 304.1372477849393 2.6919e-05 deg
tp 2459305.923291042491
(2021-Apr-01.42329104)
0.0001489 TDB
period 1968.259357362154
5.39
2.5466e-05
6.972e-08
d
yr
n .1829027250161123 2.3665e-09 deg/d
Q 3.495327433929115 3.0149e-08 au
  Orbit Determination Parameters
   # obs. used (total)      800  
   data-arc span      7742 days (21.20 yr)  
   first obs. used      1998-09-25  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57022  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 07:15:48  

Additional Information
 Earth MOID = 1.69178 au 
 Jupiter MOID = 1.75354 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 14.1   n/a MPO493364  
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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