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1185 Nikko (1927 WC)
Classification: Main-belt Asteroid          SPK-ID: 2001185
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1052182455934505 6.3856e-08  
a 2.237517562055546 8.6379e-09 AU
q 2.002089889691526 1.4227e-07 AU
i 5.701170984422104 6.3818e-06 deg
node 71.94547911576997 6.7642e-05 deg
peri 2.084617948784229 7.556e-05 deg
M 287.3844554764589 3.2995e-05 deg
tp 2457047.089854052942
(2015-Jan-24.58985405)
0.00011228 JED
period 1222.497855542215
3.35
7.0792e-06
1.938e-08
d
yr
n .2944790441700441 1.7053e-09 deg/d
Q 2.472945234419565 9.5468e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1051  
   data-arc span      31280 days (85.64 yr)  
   first obs. used      1927-11-17  
   last obs. used      2013-07-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52567  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 13:40:26  

Additional Information
 Earth MOID = 1.01608 AU 
 T_jup = 3.623 
[ 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 12.09 mag n/a PDS3 (MPC 17261)  
rotation period rot_per 3.79 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Menke, J. (2005) Minor Planet Bul. 32, 85-88.]
[Stephens, R.D. (2005) Minor Planet Bul. 32, 27-28.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
B-V BV .923 mag .025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=8.98 deg.
U-B UB .514 mag .035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=8.98 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B S   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)

1185 Nikko (1927 WC)          Discovered 1927-Nov-17 by Oikawa, O. at Tokyo
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1927 WC = 1930 SE1 = 1930 SG1 = 1930 SH1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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