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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
58842 (1998 HP55)
Classification: Main-belt Asteroid          SPK-ID: 2058842
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08123571783726817 1.3337e-07  
a 2.563000264651169 1.9016e-08 au
q 2.354793098335123 3.5373e-07 au
i 3.405492485696061 7.7121e-06 deg
node 179.9150037156224 6.8583e-05 deg
peri 323.446833525857 9.2529e-05 deg
M 193.8996031136297 5.1414e-05 deg
tp 2459691.995841680577
(2022-Apr-22.49584168)
0.00021079 TDB
period 1498.723107659443
4.10
1.6679e-05
4.566e-08
d
yr
n .2402044768377611 2.6732e-09 deg/d
Q 2.771207430967215 2.056e-08 au
  Orbit Determination Parameters
   # obs. used (total)      701  
   data-arc span      7791 days (21.33 yr)  
   first obs. used      1997-01-09  
   last obs. used      2018-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55343  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 01:29:21  

Additional Information
 Earth MOID = 1.36798 au 
 Jupiter MOID = 2.22961 au 
 T_jup = 3.427 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456404.5 (2013-Apr-22.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08092102187495304 1.3174e-07  
q 2.356951076014651 3.4928e-07 au
tp 2456689.958453448672
(2014-Feb-01.45845345)
0.00023319 TDB
node 180.1066887267576 6.8595e-05 deg
peri 322.5715796112066 9.3898e-05 deg
i 3.40392813931891 7.7076e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      701  
   data-arc span      7791 days (21.33 yr)  
   first obs. used      1997-01-09  
   last obs. used      2018-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55343  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 01:29:21  

Additional Information
 Jupiter MOID = 2.22961 au 
 T_jup = 3.427 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.735503607008057E-14 -4.598184130737802E-14 2.642212808520615E-11 -1.187860119428978E-13 7.415977834129519E-12 -2.247214554404728E-14
q -4.598184130737802E-14 1.219950471048478E-13 -6.979037007190941E-11 3.162262333773133E-13 -1.960359208199192E-11 5.943743246674328E-14
tp 2.642212808520615E-11 -6.979037007190941E-11 5.437835607352658E-8 -1.948393486846469E-10 1.495347460682297E-8 -3.257407114350616E-11
node -1.187860119428978E-13 3.162262333773133E-13 -1.948393486846469E-10 4.705261527490609E-9 -4.750015665997521E-9 -1.536077337825186E-10
peri 7.415977834129519E-12 -1.960359208199192E-11 1.495347460682297E-8 -4.750015665997521E-9 8.816798754936938E-9 1.443276206159179E-10
i -2.247214554404728E-14 5.943743246674328E-14 -3.257407114350616E-11 -1.536077337825186E-10 1.443276206159179E-10 5.940737335190567E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO474468  
diameter diameter 2.392 km 0.322 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.234   0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

58842 (1998 HP55)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-19 07:47 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin