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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1047811246705286 1.9717e-08  
a 2.237221989537019 4.8295e-09 au
q 2.002803353335692 4.4871e-08 au
i 5.697350148766588 3.52e-07 deg
node 71.8659958036525 7.0837e-06 deg
peri 2.454149330563463 1.1434e-05 deg
M 331.4647219264361 8.3013e-06 deg
tp 2459493.381678434166
(2021-Oct-05.88167843)
2.8343e-05 TDB
period 1222.255628502581
3.35
3.9577e-06
1.084e-08
d
yr
n .2945374041280104 9.5372e-10 deg/d
Q 2.471640625738345 5.3355e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3351  
   data-arc span      32981 days (90.30 yr)  
   first obs. used      1930-09-19  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38702  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:06:59  

Additional Information
 Earth MOID = 1.01755 au 
 Jupiter MOID = 2.73754 au 
 T_jup = 3.624 
[ 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 11.99   n/a E2021B10  
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. 2020-October); 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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