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18398 Bregenz (1992 SQ23)
Classification: Mars-crossing Asteroid          SPK-ID: 2018398
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3096607117648682 3.3531e-08  
a 2.307548000937345 7.9474e-09 au
q 1.592991044535488 7.9638e-08 au
i 7.836653591435158 5.8722e-06 deg
node 219.5539543340001 2.546e-05 deg
peri 102.0441569053832 2.7793e-05 deg
M 358.0651615058605 1.1327e-05 deg
tp 2459007.381240885902
(2020-Jun-06.88124089)
4.0301e-05 TDB
period 1280.337726600026
3.51
6.6144e-06
1.811e-08
d
yr
n .2811758120695159 1.4526e-09 deg/d
Q 3.022104957339203 1.0408e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1202  
   data-arc span      14279 days (39.09 yr)  
   first obs. used      1981-05-08  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52144  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:21:50  

Additional Information
 Earth MOID = .60486 au 
 Jupiter MOID = 2.3893 au 
 T_jup = 3.510 
[ 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 14.9   n/a MPO467909  
rotation period rot_per 5.376 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

18398 Bregenz           Discovered 1992 Sept. 23 by F. Borngen at Tautenburg.
Bregenz, capital of the Austrian province of Vorarlberg, is situated on the east shore of the Lake Constance and is known for the festivals on its famous seaside stage. The region was already settled in the Bronze Age. Later, the Romans established the mercantile town of Brigantium, and there was also an Alemannian colony.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1992 SQ23 = 1981 JP6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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