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 ]  
17937 (1999 HO4)
Classification: Main-belt Asteroid          SPK-ID: 2017937
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2276791799901909 4.0789e-08  
a 2.631012815608003 9.9004e-09 au
q 2.03198597520669 1.0696e-07 au
i 3.916782773329637 4.7347e-06 deg
node 201.9566638664742 5.2274e-05 deg
peri 136.8720417393729 5.298e-05 deg
M 241.0675368875609 9.1133e-06 deg
tp 2459515.468642414882
(2021-Oct-27.96864242)
4.0595e-05 TDB
period 1558.772991139436
4.27
8.7984e-06
2.409e-08
d
yr
n .2309508838338584 1.3036e-09 deg/d
Q 3.230039656009317 1.2155e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1451  
   data-arc span      11835 days (32.40 yr)  
   first obs. used      1987-08-27  
   last obs. used      2020-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48966  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:15:30  

Additional Information
 Earth MOID = 1.02543 au 
 Jupiter MOID = 2.18788 au 
 T_jup = 3.359 
[ 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 14.5   n/a MPO319309  
diameter diameter 7.056 km 0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.068   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17937 (1999 HO4)          Discovered 1999-Apr-16 by Spacewatch at Kitt Peak
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 HO4 = 1987 QG12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-29 10:16 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin