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JPL Small-Body Database Browser
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896 Sphinx (A918 PE)
Classification: Main-belt Asteroid          SPK-ID: 2000896
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1633800477915456 3.6676e-08  
a 2.28530165140777 6.4881e-09 au
q 1.91192895838267 8.3409e-08 au
i 8.190924145645203 4.0178e-06 deg
node 254.1804430873462 2.5657e-05 deg
peri 1.883955273607207 2.8003e-05 deg
M 97.72934314971165 1.2202e-05 deg
tp 2458257.940350070953
(2018-May-19.44035007)
4.2335e-05 TDB
period 1261.867418729507
3.45
5.3738e-06
1.471e-08
d
yr
n .2852914614139579 1.2149e-09 deg/d
Q 2.658674344432869 7.5482e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2502  
   data-arc span      37009 days (101.33 yr)  
   first obs. used      1918-08-01  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44455  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:13:41  

Additional Information
 Earth MOID = .89679 au 
 Jupiter MOID = 2.39546 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 11.6   n/a MPO256867  
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. 2019-January); 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 ]
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