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17937 (1999 HO4)
Classification: Main-belt Asteroid          SPK-ID: 2017937
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2277981294916512 3.9785e-08  
a 2.6310094013617 9.4948e-09 au
q 2.031670381056556 1.0475e-07 au
i 3.916903536952657 4.7053e-06 deg
node 201.9561514415489 4.7974e-05 deg
peri 136.8696716513064 4.8682e-05 deg
M 287.2743846837981 9.1677e-06 deg
tp 2459515.395845149948
(2021-Oct-27.89584515)
4.044e-05 TDB
period 1558.769956927765
4.27
8.438e-06
2.31e-08
d
yr
n .2309513333895251 1.2502e-09 deg/d
Q 3.230348421666844 1.1658e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1566  
   data-arc span      11977 days (32.79 yr)  
   first obs. used      1987-08-27  
   last obs. used      2020-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48752  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:18:02  

Additional Information
 Earth MOID = 1.02327 au 
 Jupiter MOID = 2.18801 au 
 T_jup = 3.359 
[ 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 14.57   n/a E2021B10  
diameter diameter 7.056 km 0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.068   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17937 (1999 HO4)          Discovered 1999-Apr-16 by Spacewatch at Kitt Peak
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 HO4 = 1987 QG12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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