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85611 (1998 HW16)
Classification: Main-belt Asteroid          SPK-ID: 2085611
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05906150975322089 3.6045e-08  
a 2.437773969680789 1.35e-08 au
q 2.293795358594339 8.8829e-08 au
i 8.014339088447343 6.6937e-06 deg
node 171.4368875232084 2.9037e-05 deg
peri 102.004715175872 6.675e-05 deg
M 233.6923880040259 5.8066e-05 deg
tp 2459488.270581476264
(2021-Sep-30.77058148)
0.00022377 TDB
period 1390.236158823523
3.81
1.1549e-05
3.162e-08
d
yr
n .2589488107579128 2.1511e-09 deg/d
Q 2.581752580767239 1.4298e-08 au
  Orbit Determination Parameters
   # obs. used (total)      546  
   data-arc span      7938 days (21.73 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-01-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58679  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:35:38  

Additional Information
 Earth MOID = 1.29401 au 
 Jupiter MOID = 2.47822 au 
 T_jup = 3.488 
[ 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 16.0   n/a MPO453286  
diameter diameter 2.199 km 0.579 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.175   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85611 (1998 HW16)          Discovered 1998-Apr-26 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 HW16 = 2002 LE39 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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