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11968 Demariotte (1994 PR27)
Classification: Main-belt Asteroid          SPK-ID: 2011968
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.

Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05396357458078047 2.1455e-08  
a 2.739719546042848 1.0248e-08 au
q 2.591874485989543 5.7428e-08 au
i 4.683771892970095 6.25e-07 deg
node 10.03417816730808 6.5887e-06 deg
peri 129.0691492069029 1.3177e-05 deg
M 123.8574934116473 1.2107e-05 deg
tp 2458630.627926502914
5.4477e-05 TDB
period 1656.370888898182
n .2173426268312842 1.2194e-09 deg/d
Q 2.887564606096154 1.0801e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2073  
   data-arc span      14168 days (38.79 yr)  
   first obs. used      1981-10-24  
   last obs. used      2020-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49238  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:03:38  

Additional Information
 Earth MOID = 1.60744 au 
 Jupiter MOID = 2.1069 au 
 T_jup = 3.344 
[ 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 13.67   n/a E2021B10  
diameter diameter 9.149 km 0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 16.6287 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.077   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

11968 Demariotte           Discovered 1994 Aug. 12 by E. W. Elst at the European Southern Observatory.
Edmé de Mariotte (1620-1684) was a French physicist who discovered independently of Boyle that the volume of a gas varies inversely with pressure. He proposed the word "barometer" for the instrument measuring the pressure of air and stated that Boyle's law holds only if there is no change in temperature.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1994 PR27 = 1981 UJ29 = 1990 TE16 = 1990 TR8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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