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JPL Small-Body Database Browser
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4678 Ninian (1990 SS4)
Classification: Main-belt Asteroid          SPK-ID: 2004678
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2144556869612057 4.0426e-08  
a 2.264313371565464 7.6409e-09 au
q 1.778718491970948 9.1063e-08 au
i 3.742331402169096 3.9142e-06 deg
node 30.45239365154826 4.8827e-05 deg
peri 323.3169572049245 4.9223e-05 deg
M 249.8276897896135 7.9959e-06 deg
tp 2459381.366854530278
(2021-Jun-15.86685453)
2.8733e-05 TDB
period 1244.523849677554
3.41
6.2995e-06
1.725e-08
d
yr
n .289267256785214 1.4642e-09 deg/d
Q 2.749908251159979 9.2796e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2171  
   data-arc span      24249 days (66.39 yr)  
   first obs. used      1953-12-07  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47252  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:10:54  

Additional Information
 Earth MOID = .775634 au 
 Jupiter MOID = 2.69004 au 
 T_jup = 3.584 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6   n/a MPO431551  
diameter diameter 5.003 km 0.166 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 56.72 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2014) http://www.asu.cas.cz/~ppravec/neo.htm]
[Salvaggio, F.; Marchini, A.; Papini, R.; Foylan, M. (2015) Minor Planet Bull. 42, 215.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.177   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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)

4678 Ninian (1990 SS4)          Discovered 1990-Sep-24 by McNaught, R. H. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 SS4 = 1973 SN3 = 1980 TE13 = 1989 ED7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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