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7449 Dollen (1949 QL)
Classification: Main-belt Asteroid          SPK-ID: 2007449
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1973541686614625 7.5811e-08  
a 2.221799902489424 9.0819e-09 AU
q 1.783318429801506 1.6932e-07 AU
i 6.270483683685249 8.2522e-06 deg
node 335.7834556853355 4.0096e-05 deg
peri 26.04254450033822 4.2742e-05 deg
M 233.1544164314073 1.4614e-05 deg
tp 2457426.714962699533
(2016-Feb-08.21496270)
5.001e-05 JED
period 1209.639171149064
3.31
7.4169e-06
2.031e-08
d
yr
n .2976094099681212 1.8248e-09 deg/d
Q 2.660281375177343 1.0874e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      975  
   data-arc span      23659 days (64.77 yr)  
   first obs. used      1949-08-20  
   last obs. used      2014-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51289  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:37:14  

Additional Information
 Earth MOID = .782521 AU 
 T_jup = 3.615 
[ 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 14.3 mag n/a MPO296197  
rotation period rot_per 10. h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

7449 Döllen           Discovered 1949 Aug. 21 by K. Reinmuth at Heidelberg.
Johann Heinrich Wilhelm Döllen (1820-1897), an astronomer at the Dorpat Observatory, was an assistant of W. Struve. Later he worked on geodetic problems at the Pulkovo Observatory. Döllen is notable for his discussion on errors of heliometer observations. The name was suggested by L. D. Schmadel.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090806/MPCPages.arcLast Updated: 2011-05-09

Alternate Designations
 1949 QL = 1949 QZ = 1969 TV3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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