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 ]  
91099 (1998 HK7)
Classification: Main-belt Asteroid          SPK-ID: 2091099
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2819070389681219 3.6059e-08  
a 2.340929920548295 8.7595e-09 au
q 1.681005298214645 8.5281e-08 au
i 22.70370733886235 6.2035e-06 deg
node 51.74582512278612 1.1104e-05 deg
peri 74.6076690248473 1.6894e-05 deg
M 117.2311721099231 1.0606e-05 deg
tp 2458574.488176934999
(2019-Mar-31.98817693)
3.7523e-05 TDB
period 1308.22078755296
3.58
7.3428e-06
2.01e-08
d
yr
n .2751829075223484 1.5445e-09 deg/d
Q 3.000854542881946 1.1229e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1128  
   data-arc span      13323 days (36.48 yr)  
   first obs. used      1982-11-13  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40385  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:03:21  

Additional Information
 Earth MOID = .828697 au 
 Jupiter MOID = 2.54095 au 
 T_jup = 3.410 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456745.5 (2014-Mar-29.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2823977911198094 3.6088e-08  
q 1.679266904469299 8.5418e-08 au
tp 2457267.422766035198
(2015-Sep-01.92276604)
3.5085e-05 TDB
node 51.78029329611113 1.1103e-05 deg
peri 74.5391525782548 1.6877e-05 deg
i 22.70932776949269 6.2041e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1128  
   data-arc span      13323 days (36.48 yr)  
   first obs. used      1982-11-13  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40385  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:03:21  

Additional Information
 Jupiter MOID = 2.54095 au 
 T_jup = 3.410 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.302341747397766E-15 -3.074145539810088E-15 -3.280375778794048E-13 2.457812409290891E-14 -1.355771657760746E-13 -1.924301656664275E-14
q -3.074145539810088E-15 7.296224787352121E-15 8.124760327163599E-13 -5.989434507784904E-14 3.292266861374506E-13 4.5968239728829E-14
tp -3.280375778794048E-13 8.124760327163599E-13 1.230964263335533E-9 -2.9719077406724E-11 4.563909567640669E-10 1.131548325650457E-11
node 2.457812409290891E-14 -5.989434507784904E-14 -2.9719077406724E-11 1.232865104360625E-10 -1.228318329891727E-10 -6.353020928992467E-12
peri -1.355771657760746E-13 3.292266861374506E-13 4.563909567640669E-10 -1.228318329891727E-10 2.84827769204313E-10 9.475114787667798E-12
i -1.924301656664275E-14 4.5968239728829E-14 1.131548325650457E-11 -6.353020928992467E-12 9.475114787667798E-12 3.849104256687654E-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 14.1   n/a MPO385377  
diameter diameter 4.646 km 0.606 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.247   0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91099 (1998 HK7)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1998 HK7 = 2000 SY225 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-15 18:11 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin