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 ]  
896 Sphinx (A918 PE)
Classification: Main-belt Asteroid          SPK-ID: 2000896
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1631194724486315 3.3487e-08  
a 2.285750958819587 5.8712e-09 au
q 1.912900468267982 7.6887e-08 au
i 8.189648774694527 3.7273e-06 deg
node 254.1760848224174 2.3216e-05 deg
peri 1.995293789715413 2.5515e-05 deg
M 268.7281361427426 1.2117e-05 deg
tp 2459520.519329794352
(2021-Nov-02.01932979)
4.3003e-05 TDB
period 1262.239575891011
3.46
4.8633e-06
1.331e-08
d
yr
n .2852073464309476 1.0989e-09 deg/d
Q 2.658601449371192 6.829e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3040  
   data-arc span      37428 days (102.47 yr)  
   first obs. used      1918-08-01  
   last obs. used      2021-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41868  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:50:45  

Additional Information
 Earth MOID = .896402 au 
 Jupiter MOID = 2.39496 au 
 T_jup = 3.571 
[ 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 11.73   n/a E2021B10  
diameter diameter 11.974 km 0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 21.038 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:
[Polakis, T. (2018) Minor Planet Bull. 45, 347-352.]
geometric albedo albedo 0.242   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

896 Sphinx (A918 PE)          Discovered 1918-Aug-01 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Feb-25 17:00 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin