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101174 (1998 SZ4)
Classification: Main-belt Asteroid          SPK-ID: 2101174
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1743619929096094 4.8677e-08  
a 2.353728505397388 9.2699e-09 au
q 1.943327712428143 1.158e-07 au
i 3.279312823262515 4.5561e-06 deg
node 125.7009738084996 8.766e-05 deg
peri 245.6784695071225 8.8445e-05 deg
M .3314803902184875 1.2474e-05 deg
tp 2458999.285525730550
(2020-May-29.78552573)
4.57e-05 TDB
period 1318.964107391011
3.61
7.7919e-06
2.133e-08
d
yr
n .2729414682194053 1.6124e-09 deg/d
Q 2.764129298366633 1.0886e-08 au
  Orbit Determination Parameters
   # obs. used (total)      631  
   data-arc span      10558 days (28.91 yr)  
   first obs. used      1991-11-29  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60029  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:02:01  

Additional Information
 Earth MOID = .945866 au 
 Jupiter MOID = 2.70101 au 
 T_jup = 3.533 
[ 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 16.0   n/a MPO436472  
diameter diameter 1.756 km 0.283 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.990 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.250   0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101174 (1998 SZ4)          Discovered 1998-Sep-17 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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