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 ]  
29162 (1989 SD4)
Classification: Main-belt Asteroid          SPK-ID: 2029162
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04491147886314934 5.4799e-08  
a 2.57934458790505 1.5424e-08 au
q 2.463502407964574 1.5e-07 au
i 15.16193683740855 6.0938e-06 deg
node 34.27242127569217 1.4326e-05 deg
peri 96.08560556982697 9.8615e-05 deg
M 301.0564680917259 9.2422e-05 deg
tp 2458848.239998072106
(2019-Dec-30.73999807)
0.0003876 TDB
period 1513.082036630361
4.14
1.3572e-05
3.716e-08
d
yr
n .2379249712075898 2.1342e-09 deg/d
Q 2.695186767845526 1.6117e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1500  
   data-arc span      11027 days (30.19 yr)  
   first obs. used      1989-09-26  
   last obs. used      2019-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48764  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:54:08  

Additional Information
 Earth MOID = 1.52227 au 
 Jupiter MOID = 2.34204 au 
 T_jup = 3.375 
[ 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 13.9   n/a MPO502376  
diameter diameter 5.116 km 0.574 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.505 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.223   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

29162 (1989 SD4)          Discovered 1989-Sep-26 by Elst, E. W. at La Silla
Reference: 20011002/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 SD4 = 1989 TB4 = 2000 JZ28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-24 14:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin