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108581 (2001 MS8)
Classification: Main-belt Asteroid          SPK-ID: 2108581
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2030272667787978 3.0813e-08  
a 2.367583522537624 8.4006e-09 au
q 1.886899511086292 7.3364e-08 au
i 1.573304552550547 4.2279e-06 deg
node 322.4795604514721 0.00017149 deg
peri 321.6574899810849 0.00017202 deg
M 83.53669477296866 1.5395e-05 deg
tp 2458691.732787417653
(2019-Jul-27.23278742)
5.6191e-05 TDB
period 1330.627179250258
3.64
7.082e-06
1.939e-08
d
yr
n .2705491106854153 1.4399e-09 deg/d
Q 2.848267533988956 1.0106e-08 au
  Orbit Determination Parameters
   # obs. used (total)      997  
   data-arc span      7198 days (19.71 yr)  
   first obs. used      2000-02-03  
   last obs. used      2019-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54439  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:09:57  

Additional Information
 Earth MOID = .870768 au 
 Jupiter MOID = 2.30984 au 
 T_jup = 3.518 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456291.5 (2012-Dec-30.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2029781267000461 3.0823e-08  
q 1.886837394416194 7.3445e-08 au
tp 2456027.173667029904
(2012-Apr-09.67366703)
5.174e-05 TDB
node 322.6440602717555 0.00017194 deg
peri 320.9912544714625 0.00017245 deg
i 1.571641915725454 4.2207e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      997  
   data-arc span      7198 days (19.71 yr)  
   first obs. used      2000-02-03  
   last obs. used      2019-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54439  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:09:57  

Additional Information
 Jupiter MOID = 2.30984 au 
 T_jup = 3.518 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.500304425611666E-16 -2.254135563655938E-15 5.654758868525237E-14 -2.77233388623385E-16 2.100398354440488E-15 1.997880831294376E-16
q -2.254135563655938E-15 5.394101589878342E-15 -5.843808955148476E-14 2.280074096828036E-15 1.524268116342528E-14 -4.355678491965096E-16
tp 5.654758868525237E-14 -5.843808955148476E-14 2.677045373330906E-9 -1.505936278133082E-12 7.158302559268601E-10 -3.447174793530067E-13
node -2.77233388623385E-16 2.280074096828036E-15 -1.505936278133082E-12 2.956205789080082E-8 -2.955147257364346E-8 2.558617837024168E-10
peri 2.100398354440488E-15 1.524268116342528E-14 7.158302559268601E-10 -2.955147257364346E-8 2.974064815453175E-8 -2.558795852270593E-10
i 1.997880831294376E-16 -4.355678491965096E-16 -3.447174793530067E-13 2.558617837024168E-10 -2.558795852270593E-10 1.781441051227128E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO436522  
rotation period rot_per 10.91 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.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) ArXiv:1901.08719.]

108581 (2001 MS8)          Discovered 2001-Jun-16 by NEAT at Haleakala
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 2001 MS8 = 2000 EL8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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