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 ]  
85669 (1998 QK55)
Classification: Main-belt Asteroid          SPK-ID: 2085669
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1251023623199065 4.0046e-08  
a 2.331468979690633 7.77e-09 au
q 2.039796702655752 9.4957e-08 au
i 3.801658254676873 4.6921e-06 deg
node 191.9260669039744 5.3223e-05 deg
peri 198.1441546150515 5.6073e-05 deg
M 27.15179506381136 1.8196e-05 deg
tp 2458902.429376726904
(2020-Feb-22.92937673)
6.553e-05 TDB
period 1300.297983810673
3.56
6.5002e-06
1.78e-08
d
yr
n .2768596156282412 1.384e-09 deg/d
Q 2.623141256725513 8.742e-09 au
  Orbit Determination Parameters
   # obs. used (total)      584  
   data-arc span      10074 days (27.58 yr)  
   first obs. used      1993-04-18  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55584  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:14:26  

Additional Information
 Earth MOID = 1.0452 au 
 Jupiter MOID = 2.79884 au 
 T_jup = 3.557 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.6   n/a MPO432400  
rotation period rot_per 4.368 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

85669 (1998 QK55)          Discovered 1998-Aug-26 by ODAS at Caussols
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-25 01:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin