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91081 (1998 FR109)
Classification: Main-belt Asteroid          SPK-ID: 2091081
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1379701763590428 1.0812e-07  
a 2.550049179651453 1.3923e-08 au
q 2.19821844461071 2.8046e-07 au
i 6.656855074621675 9.5955e-06 deg
node 322.8006666933398 4.1937e-05 deg
peri 155.0953948438411 6.1081e-05 deg
M 313.4467537676391 3.9556e-05 deg
tp 2459588.839609885673
(2022-Jan-09.33960989)
0.0001633 TDB
period 1487.377683894137
4.07
1.2181e-05
3.335e-08
d
yr
n .2420367092354619 1.9822e-09 deg/d
Q 2.901879914692197 1.5844e-08 au
  Orbit Determination Parameters
   # obs. used (total)      677  
   data-arc span      8287 days (22.69 yr)  
   first obs. used      1998-03-31  
   last obs. used      2020-12-07  
   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 14:43:28  

Additional Information
 Earth MOID = 1.21666 au 
 Jupiter MOID = 2.17629 au 
 T_jup = 3.418 
[ 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 15.60   n/a MPCxxxxx  
rotation period rot_per 5.441 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.]

91081 (1998 FR109)          Discovered 1998-Mar-31 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1998 FR109 = 2000 UH64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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