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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1615263143650169 9.7176e-09  
a 2.745630796177446 1.092e-08 au
q 2.302139173063816 2.6635e-08 au
i 14.15512350040844 4.9001e-07 deg
node 188.2910527882351 3.0513e-06 deg
peri 294.1963296799872 1.2794e-05 deg
M 58.94796305682577 9.6618e-06 deg
tp 2458928.400380218166
(2020-Mar-19.90038022)
4.4478e-05 TDB
period 1661.734486517048
4.55
9.9136e-06
2.714e-08
d
yr
n .2166411077828388 1.2924e-09 deg/d
Q 3.189122419291076 1.2684e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2025  
   data-arc span      14423 days (39.49 yr)  
   first obs. used      1981-09-18  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4622  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:14:34  

Additional Information
 Earth MOID = 1.35646 au 
 Jupiter MOID = 1.99365 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 13.25   n/a E2021B10  
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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