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31231 Uthmann (1998 CA)
Classification: Main-belt Asteroid          SPK-ID: 2031231
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2332756157775462 4.6444e-08  
a 2.577371564263587 1.8768e-08 au
q 1.976133625522462 1.1699e-07 au
i 9.396734753522908 6.4778e-06 deg
node 95.72028944174829 4.7002e-05 deg
peri 21.07978157468645 5.3371e-05 deg
M 174.7533113928825 2.6409e-05 deg
tp 2456866.853433971707
(2014-Jul-28.35343397)
0.00010533 JED
period 1511.346260995328
4.14
1.6508e-05
4.52e-08
d
yr
n .238198227163982 2.6018e-09 deg/d
Q 3.178609503004713 2.3147e-08 au
  Orbit Determination Parameters
   # obs. used (total)      740  
   data-arc span      22639 days (61.98 yr)  
   first obs. used      1953-06-14  
   last obs. used      2015-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54441  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 15:19:07  

Additional Information
 Earth MOID = .994115 au 
 Jupiter MOID = 1.9587 au 
 T_jup = 3.369 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6 mag n/a MPO279840  
rotation period rot_per 16.9 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:
[Stephens, R.D.; French, L.M.; James, D.; Connour, K.; Warner, B.D. (2016) Minor Planet Bul. 43, 10-15.]

31231 Uthmann           Discovered 1998 Feb. 1 by J. Kandler and G. Lehmann at Volkssternwarte Drebach.
Barbara Uthmann (1514-1575) is said to have introduced the art of making lace into the Erzgebirge mountains in Saxony. After her husband's death in 1553, she successfully continued to manage his businesses and established a braid production, thus helping poor miner families to a new way of earning money.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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