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7247 Robertstirling (1991 TD1)
Classification: Inner Main-belt Asteroid          SPK-ID: 2007247
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1183634554978487 7.2629e-08  
a 1.917235833663798 8.492e-09 AU
q 1.690305175387052 1.4109e-07 AU
i 22.91840059027949 8.1773e-06 deg
node 190.8459713345116 1.2675e-05 deg
peri 193.931689397102 2.9525e-05 deg
M 266.8623951408571 2.9157e-05 deg
tp 2457251.361663421760
(2015-Aug-16.86166342)
7.9181e-05 JED
period 969.6427019828868
2.65
6.4422e-06
1.764e-08
d
yr
n .3712707776419212 2.4667e-09 deg/d
Q 2.144166491940544 9.4971e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      930  
   data-arc span      14149 days (38.74 yr)  
   first obs. used      1975-10-03  
   last obs. used      2014-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49302  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:16:34  

Additional Information
 Earth MOID = .695032 AU 
 T_jup = 3.824 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4 mag n/a MPO263414  
rotation period rot_per 6.3515 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Warner, B.D. (2013). Minor Planet Bul. 40, 36-42.]

7247 Robertstirling           Discovered 1991 Oct. 12 by R. H. McNaught at Siding Spring.
Robert Stirling (1790-1878) was a Scottish inventor who invented and built the first practical closed-cycle hot-air engine. Although several other designs were invented elsewhere, this general class of engine, incorporating his `Economiser', is now termed the Stirling engine.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-08-10Last Updated: 2014-08-13

Alternate Designations
 1991 TD1 = 1975 TQ2 = 1990 FS4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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