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

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1056977251920792 2.9806e-08  
a 2.237153948428751 5.5661e-09 au
q 2.000691865175354 6.7811e-08 au
i 5.701420231929643 3.3038e-06 deg
node 71.90230300999221 4.0783e-05 deg
peri 1.836707199005844 4.5816e-05 deg
M 97.74443681234428 2.0741e-05 deg
tp 2458268.657672360534
(2018-May-30.15767236)
7.0067e-05 TDB
period 1222.199869845896
3.35
4.5613e-06
1.249e-08
d
yr
n .2945508413819349 1.0993e-09 deg/d
Q 2.473616031682148 6.1544e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2745  
   data-arc span      32377 days (88.64 yr)  
   first obs. used      1930-09-19  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41111  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:20:09  

Additional Information
 Earth MOID = 1.01535 au 
 Jupiter MOID = 2.74013 au 
 T_jup = 3.623 
[ 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 12.09   n/a PDS3 (MPC 17261)  
diameter diameter 8.347 km 0.297 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.79 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Menke, J. (2005) Minor Planet Bull. 32, 85-88.]
[Stephens, R.D. (2005) Minor Planet Bull. 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.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.370   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.923   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.98 deg.
U-B UB 0.514   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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