Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456748.5 (2014-Apr-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05999916468205198 3.6026e-08  
q 2.291521839847276 8.8908e-08 au
tp 2456708.555613397742
(2014-Feb-20.05561340)
0.00022385 TDB
node 171.4676828682246 2.9027e-05 deg
peri 102.1749835577346 6.596e-05 deg
i 8.015204671933763 6.6955e-06 deg
  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
 Jupiter MOID = 2.47822 au 
 T_jup = 3.488 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.297858543991083E-15 -3.170396735557872E-15 7.913002912228274E-13 -1.605625599670527E-15 2.029911976236226E-13 4.681129801900213E-16
q -3.170396735557872E-15 7.904681584260814E-15 -2.519024306949069E-12 3.510235503061427E-15 -6.495391785979788E-13 -4.757854464673385E-16
tp 7.913002912228274E-13 -2.519024306949069E-12 5.010899383559877E-8 -5.824598072422413E-11 1.326803721250217E-8 -1.504761739294032E-11
node -1.605625599670527E-15 3.510235503061427E-15 -5.824598072422413E-11 8.425405037324199E-10 -8.49102036716038E-10 1.835571440654958E-11
peri 2.029911976236226E-13 -6.495391785979788E-13 1.326803721250217E-8 -8.49102036716038E-10 4.350704676701119E-9 -2.205543993255481E-11
i 4.681129801900213E-16 -4.757854464673385E-16 -1.504761739294032E-11 1.835571440654958E-11 -2.205543993255481E-11 4.482968960090493E-11

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-28 17:43 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin