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91577 (1999 SU8)
Classification: Main-belt Asteroid          SPK-ID: 2091577
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1378853257686803 1.6978e-08  
a 2.566194067296945 1.0442e-08 au
q 2.212353562342051 4.7755e-08 au
i 16.30205552539998 2.9322e-07 deg
node 38.79671542911975 2.9185e-06 deg
peri 49.33276268721848 7.819e-06 deg
M 17.80501042485046 7.7119e-06 deg
tp 2459322.237014725727
(2021-Apr-17.73701473)
3.215e-05 TDB
period 1501.525360604386
4.11
9.1648e-06
2.509e-08
d
yr
n .2397561902351718 1.4634e-09 deg/d
Q 2.920034572251839 1.1882e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2612  
   data-arc span      7907 days (21.65 yr)  
   first obs. used      1999-09-11  
   last obs. used      2021-05-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35759  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 23:40:55  

Additional Information
 Earth MOID = 1.25825 au 
 Jupiter MOID = 2.48886 au 
 T_jup = 3.363 
[ 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 13.58   n/a MPCxxxxx  
diameter diameter 5.970 km 0.217 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.7266 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.216   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91577 (1999 SU8)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 SU8 = 2001 AX1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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