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JPL Small-Body Database Browser
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11681 Ortner (1998 EP6)
Classification: Main-belt Asteroid          SPK-ID: 2011681
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1028029869228415 3.7765e-08  
a 2.188980940564214 6.7341e-09 au
q 1.963947161557042 8.4261e-08 au
i 2.01710521375116 3.7106e-06 deg
node 324.7158945856619 0.00010292 deg
peri 215.57125881017 0.00010492 deg
M 301.6816006385766 2.3246e-05 deg
tp 2459192.130437879758
7.6822e-05 TDB
period 1182.936404155607
n .3043274336095625 1.4043e-09 deg/d
Q 2.414014719571387 7.4264e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1854  
   data-arc span      28028 days (76.74 yr)  
   first obs. used      1943-04-03  
   last obs. used      2019-12-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49759  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 22:34:00  

Additional Information
 Earth MOID = .967384 au 
 Jupiter MOID = 2.54852 au 
 T_jup = 3.667 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9   n/a MPO347617  
diameter diameter 3.908 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.00 h n/a LCDB (Rev. 2019-August); 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. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.349   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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