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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1631975487281988 3.6632e-08  
a 2.285799163449007 6.2399e-09 au
q 1.912762343089162 8.3339e-08 au
i 8.190329928684998 4.0071e-06 deg
node 254.1810497277601 2.3448e-05 deg
peri 1.962795125869455 2.5716e-05 deg
M 211.729046643584 1.2197e-05 deg
tp 2459520.387182456707
(2021-Nov-01.88718246)
4.3706e-05 TDB
period 1262.279505511224
3.46
5.1688e-06
1.415e-08
d
yr
n .2851983244821834 1.1678e-09 deg/d
Q 2.658835983808853 7.2583e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2796  
   data-arc span      37161 days (101.74 yr)  
   first obs. used      1918-08-01  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43161  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:14:57  

Additional Information
 Earth MOID = .897908 au 
 Jupiter MOID = 2.39572 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-August); 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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