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21992 (1999 XZ23)
Classification: Main-belt Asteroid          SPK-ID: 2021992
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09137510444018812 1.7491e-08  
a 2.15730136954274 5.399e-09 au
q 1.960177731591811 3.894e-08 au
i 4.354346092652182 1.2075e-06 deg
node 34.20797024638819 7.0063e-06 deg
peri 243.5981727272157 1.0758e-05 deg
M 56.4484875403674 9.5503e-06 deg
tp 2459215.025977838794
(2020-Dec-31.52597784)		 3.0339e-05 TDB
period 1157.349839201891
3.17		 4.3447e-06
1.19e-08		 d
yr
n .3110554715661915 1.1677e-09 deg/d
Q 2.354425007493668 5.8924e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2368  
   data-arc span      16475 days (45.11 yr)  
   first obs. used      1976-05-30  
   last obs. used      2021-07-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49807  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:14:42  

Additional Information
 Earth MOID = .948413 au 
 Jupiter MOID = 2.72078 au 
 T_jup = 3.691 
[ 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 14.44   n/a E2021B10  
diameter diameter 3.673 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.250   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21992 (1999 XZ23)          Discovered 1999-Dec-06 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XZ23 = 1998 HM61 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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