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22691 (1998 QD99)
Classification: Main-belt Asteroid          SPK-ID: 2022691
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06956617386783598 3.3878e-08  
a 2.910416399450748 1.3644e-08 au
q 2.707949866178756 9.8338e-08 au
i 3.297915891926058 5.0859e-07 deg
node 93.05638032324535 4.6415e-05 deg
peri 288.63443489 5.3724e-05 deg
M 147.9064373800375 1.6632e-05 deg
tp 2458455.398057274072
(2018-Dec-02.89805727)
8.2178e-05 TDB
period 1813.556624936577
4.97
1.2753e-05
3.492e-08
d
yr
n .1985049681107089 1.3959e-09 deg/d
Q 3.11288293272274 1.4593e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2252  
   data-arc span      12787 days (35.01 yr)  
   first obs. used      1986-03-12  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4765  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:09:31  

Additional Information
 Earth MOID = 1.71166 au 
 Jupiter MOID = 2.23982 au 
 T_jup = 3.278 
[ 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 13.06   n/a E2021B10  
diameter diameter 6.851 km 0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.285   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22691 (1998 QD99)          Discovered 1998-Aug-26 by Elst, E. W. at La Silla
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 QD99 = 1984 YS = 1986 EU4 = 1989 YJ5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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