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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1027743210462064 5.5777e-08  
a 2.188832520386807 9.2551e-09 au
q 1.963876744220196 1.2128e-07 au
i 2.017377859886116 5.7755e-06 deg
node 324.7782153177659 0.00012148 deg
peri 215.7897749762332 0.00012398 deg
M 235.294035651083 2.5194e-05 deg
tp 2458010.233949605366
(2017-Sep-13.73394961)
8.3186e-05 JED
period 1182.816095669867
3.24
7.502e-06
2.054e-08
d
yr
n .3043583878490598 1.9304e-09 deg/d
Q 2.413788296553418 1.0206e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1382  
   data-arc span      26548 days (72.68 yr)  
   first obs. used      1943-04-03  
   last obs. used      2015-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51097  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:18:27  

Additional Information
 Earth MOID = .966556 au 
 Jupiter MOID = 2.5514 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 13.9 mag n/a MPO347617  
rotation period rot_per 4.9977 h n/a LCDB (Rev. 2016-February); 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) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

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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