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17827 (1998 HW)
Classification: Main-belt Asteroid          SPK-ID: 2017827
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1617226457608908 3.1861e-08  
a 2.74608536689858 1.2055e-08 au
q 2.301981175878475 8.8211e-08 au
i 14.15443978895131 5.5436e-06 deg
node 188.3040610667994 1.3782e-05 deg
peri 294.3155285090719 2.2625e-05 deg
M 288.8891156297773 1.6976e-05 deg
tp 2458928.824322492999
(2020-Mar-20.32432249)
7.8829e-05 TDB
period 1662.147182449807
4.55
1.0945e-05
2.997e-08
d
yr
n .2165873177785633 1.4262e-09 deg/d
Q 3.190189557918686 1.4005e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1698  
   data-arc span      13959 days (38.22 yr)  
   first obs. used      1981-09-18  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46932  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:23:09  

Additional Information
 Earth MOID = 1.35663 au 
 Jupiter MOID = 1.99443 au 
 T_jup = 3.285 
[ 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 13.2   n/a MPO347663  
diameter diameter 6.238 km 0.273 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.261   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

17827 (1998 HW)          Discovered 1998-Apr-17 by Spacewatch at Kitt Peak
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HW = 1982 VK2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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