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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0668148591628583 3.9168e-08  
a 2.756613677749987 1.1301e-08 au
q 2.572430923104712 1.1082e-07 au
i 8.241745737778116 4.5953e-06 deg
node 31.17011036944954 3.1762e-05 deg
peri 94.97774277010485 4.6678e-05 deg
M 24.37578054943456 3.3074e-05 deg
tp 2457287.307326535466
(2015-Sep-21.80732654)
0.00015351 JED
period 1671.71518321605
4.58
1.028e-05
2.815e-08
d
yr
n .2153476881794129 1.3242e-09 deg/d
Q 2.940796432395261 1.2056e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1465  
   data-arc span      35865 days (98.19 yr)  
   first obs. used      1917-10-03  
   last obs. used      2015-12-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55713  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:31:13  

Additional Information
 Earth MOID = 1.60373 au 
 Jupiter MOID = 2.11115 au 
 T_jup = 3.325 
[ 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 8.6 mag n/a MPO337240  
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 LCDB (Rev. 2015-December); Warner et al., 2009 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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