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11681 Ortner (1998 EP6)
Classification: Main-belt Asteroid          SPK-ID: 2011681
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1026516152242149 5.9192e-08  
a 2.1887018454343 9.6054e-09 AU
q 1.964028065756249 1.296e-07 AU
i 2.017711995424283 5.8066e-06 deg
node 324.7854112245503 0.00013168 deg
peri 215.6154395841602 0.0001341 deg
M 52.88014276638513 2.5135e-05 deg
tp 2456826.772547524893
(2014-Jun-18.27254752)
8.2498e-05 JED
period 1182.710174731129
3.24
7.7857e-06
2.132e-08
d
yr
n .304385645521178 2.0037e-09 deg/d
Q 2.413375625112351 1.0591e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1287  
   data-arc span      26441 days (72.39 yr)  
   first obs. used      1943-04-03  
   last obs. used      2015-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51093  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:33:39  

Additional Information
 Earth MOID = .968559 AU 
 T_jup = 3.667 
[ 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 13.8 mag n/a MPO250328  
rotation period rot_per 4.9977 h n/a LCDB (Rev. 2015-July); 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) arXiv:1506.08493.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]

11681 Ortner           Discovered 1998 Mar. 1 by the OCA-DLR Asteroid Survey at Caussols.
Johannes Ortner (b. 1933) is founder and unique director of the Summer School Alpbach. Held annually since 1975, Alpbach provides in-depth teaching on all aspects of space science and technology for European students, culminating in the design of innovative space-mission proposals.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20081113/MPCPages.arcLast Updated: 2008-11-17

Alternate Designations
 1998 EP6 = 1943 GD = 1980 UP1 = 1985 DW3 = 1986 RY8 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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