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JPL Small-Body Database Browser
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7722 Firneis (2240 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2007722
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07708545248267519 4.9066e-08  
a 2.35183788874975 1.0128e-08 au
q 2.170545400929576 1.1504e-07 au
i 7.087990734883681 5.4029e-06 deg
node 16.23415405625261 3.1877e-05 deg
peri 175.476393890496 4.1201e-05 deg
M 46.14484563202381 2.5559e-05 deg
tp 2458431.638673093770
(2018-Nov-09.13867309)
9.3521e-05 TDB
period 1317.375252937357
3.61
8.5096e-06
2.33e-08
d
yr
n .2732706563276535 1.7652e-09 deg/d
Q 2.533130376569924 1.0908e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1520  
   data-arc span      16769 days (45.91 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5249  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 00:58:59  

Additional Information
 Earth MOID = 1.17035 au 
 Jupiter MOID = 2.42329 au 
 T_jup = 3.543 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO395074  

7722 Firneis           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Named in honor of Maria Gertrude Firneis (b. 1947), a professor of astronomy at the University of Vienna. She has worked on delicate astrometric and statistical problems and is an authority on the history of astronomy. She is also engaged in dating ancient events and correlating them with celestial phenomena. Name suggested and citation prepared by H. Haupt.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980211/MPCPages.arcLast Updated: 2009-11-17

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Alternate Designations
 2240 T-2 = 1997 GV17 
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