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44417 (1998 SS146)
Classification: Main-belt Asteroid          SPK-ID: 2044417
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02046467584704188 3.3499e-08  
a 2.992787070814388 1.6256e-08 au
q 2.931540653530954 9.7202e-08 au
i 9.64490300039024 3.7626e-06 deg
node 190.4467492306611 2.0808e-05 deg
peri 75.41331870366992 9.8549e-05 deg
M 185.2631337522367 9.7911e-05 deg
tp 2459918.397521850470
(2022-Dec-04.89752185)
0.00051565 TDB
period 1891.089813855462
5.18
1.5408e-05
4.218e-08
d
yr
n .1903664211833755 1.5511e-09 deg/d
Q 3.054033488097823 1.6589e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1835  
   data-arc span      14557 days (39.85 yr)  
   first obs. used      1980-03-23  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47649  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 07:45:07  

Additional Information
 Earth MOID = 1.93568 au 
 Jupiter MOID = 1.93919 au 
 T_jup = 3.234 
[ 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 13.2   n/a MPO324707  
diameter diameter 7.482 km 0.182 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.632 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2016) Astron. Astrophys., submitted.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2018) Icarus 299, 84-96.]
geometric albedo albedo 0.199   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

44417 (1998 SS146)          Discovered 1998-Sep-20 by Elst, E. W. at La Silla
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 SS146 = 1980 FU5 = 2000 AE180 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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