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127 Johanna
Classification: Main-belt Asteroid          SPK-ID: 2000127
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 79 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06609287543805727 4.2235e-08  
a 2.754612911940809 1.2074e-08 AU
q 2.572552623871841 1.1774e-07 AU
i 8.241473227244732 4.7063e-06 deg
node 31.19597552716896 3.4322e-05 deg
peri 95.09760875677277 4.8803e-05 deg
M 298.0389429180543 3.3566e-05 deg
tp 2457287.912473837425
(2015-Sep-22.41247384)
0.00015596 JED
period 1669.895502987179
4.57
1.0979e-05
3.006e-08
d
yr
n .2155823519232293 1.4174e-09 deg/d
Q 2.936673200009777 1.2872e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1177  
   data-arc span      35398 days (96.91 yr)  
   first obs. used      1917-10-03  
   last obs. used      2014-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58607  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:33:52  

Additional Information
 Earth MOID = 1.604 AU 
 T_jup = 3.326 
[ 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 8.5 mag n/a MPO265955  
diameter diameter 122 km n/a J.G. Williams (E-mail September 1990) based on assumed albedo of 0.048 for C-type
rotation period rot_per 12.7988 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
Tholen spectral type spec_T CX   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

127 Johanna          Discovered 1872-Nov-05 by Henry, Prosper at Paris
In their cooperative program it will probably never be known which of the Henry brothers discovered which planet. With strict impartiality, these discoveries were announced as having been made alternatively by Prosper and by Paul.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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