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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1744698403153903 4.379e-08  
a 2.354140943865722 8.5963e-09 au
q 1.943414349309547 1.0306e-07 au
i 3.279308099940372 4.3488e-06 deg
node 125.7002152606714 8.2196e-05 deg
peri 245.7167893468339 8.3055e-05 deg
M 54.87863486159546 1.2148e-05 deg
tp 2458999.383400758862
(2020-May-29.88340076)
4.4117e-05 TDB
period 1319.310801178057
3.61
7.2264e-06
1.978e-08
d
yr
n .2728697435650068 1.4946e-09 deg/d
Q 2.764867538421897 1.0096e-08 au
  Orbit Determination Parameters
   # obs. used (total)      712  
   data-arc span      10643 days (29.14 yr)  
   first obs. used      1991-11-29  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57946  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:33  

Additional Information
 Earth MOID = .944475 au 
 Jupiter MOID = 2.70137 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. 2020-October); 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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