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 ]  
173273 (1999 SZ4)
Classification: Main-belt Asteroid          SPK-ID: 2173273
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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2753723395986133 5.7678e-08  
a 2.352895456574926 9.8737e-09 au
q 1.704973129866941 1.3816e-07 au
i 12.33285790591266 5.6459e-06 deg
node 354.6612177405503 2.2952e-05 deg
peri 342.6817018764636 2.3889e-05 deg
M 267.6847262156948 8.0537e-06 deg
tp 2459338.544157880139
(2021-May-04.04415788)
3.056e-05 TDB
period 1318.263943203947
3.61
8.2979e-06
2.272e-08
d
yr
n .2730864345155687 1.719e-09 deg/d
Q 3.000817783282911 1.2593e-08 au
  Orbit Determination Parameters
   # obs. used (total)      579  
   data-arc span      7093 days (19.42 yr)  
   first obs. used      1999-09-08  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50768  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:00:53  

Additional Information
 Earth MOID = .700705 au 
 Jupiter MOID = 2.41297 au 
 T_jup = 3.475 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456952.5 (2014-Oct-22.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2750905098616904 5.8022e-08  
q 1.705851971700161 1.3904e-07 au
tp 2456698.660025219752
(2014-Feb-10.16002522)
2.595e-05 TDB
node 354.715502926888 2.2985e-05 deg
peri 342.195627600502 2.3912e-05 deg
i 12.32519208147611 5.6474e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      579  
   data-arc span      7093 days (19.42 yr)  
   first obs. used      1999-09-08  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50768  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:00:53  

Additional Information
 Jupiter MOID = 2.41297 au 
 T_jup = 3.475 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.366530453684956E-15 -8.057730900613078E-15 -5.663253817577372E-13 -3.467190103904667E-14 -1.836635161585864E-13 -6.819746510163923E-15
q -8.057730900613078E-15 1.933210020554989E-14 1.334125065156424E-12 8.442971256585345E-14 4.365046122020695E-13 1.650393977384676E-14
tp -5.663253817577372E-13 1.334125065156424E-12 6.733952944708433E-10 1.1568822278019E-11 1.956824403310954E-10 -8.292256602032581E-14
node -3.467190103904667E-14 8.442971256585345E-14 1.1568822278019E-11 5.282889327365553E-10 -5.117235067157923E-10 -5.841556717758075E-11
peri -1.836635161585864E-13 4.365046122020695E-13 1.956824403310954E-10 -5.117235067157923E-10 5.717849782833809E-10 5.733454446972379E-11
i -6.819746510163923E-15 1.650393977384676E-14 -8.292256602032581E-14 -5.841556717758075E-11 5.733454446972379E-11 3.189264091719777E-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 15.8   n/a MPO264384  
diameter diameter 3.460 km 0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.523 h n/a LCDB (Rev. 2019-August); 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 0.080   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173273 (1999 SZ4)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-19 23:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin