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22578 (1998 HE59)
Classification: Main-belt Asteroid          SPK-ID: 2022578
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2163063668409516 2.5306e-08  
a 2.391739196853433 7.8799e-09 au
q 1.874390780750972 6.1257e-08 au
i 3.355389887611833 3.7951e-06 deg
node 121.5731793133146 5.6857e-05 deg
peri 291.7546396506853 5.7758e-05 deg
M 181.0948068623846 1.1117e-05 deg
tp 2459871.912781824704
(2022-Oct-19.41278182)
4.3049e-05 TDB
period 1351.042958663414
3.70
6.6768e-06
1.828e-08
d
yr
n .2664608091782275 1.3168e-09 deg/d
Q 2.909087612955895 9.5844e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1757  
   data-arc span      14123 days (38.67 yr)  
   first obs. used      1981-09-28  
   last obs. used      2020-05-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49339  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:07:47  

Additional Information
 Earth MOID = .888009 au 
 Jupiter MOID = 2.46209 au 
 T_jup = 3.497 
[ 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 14.58   n/a E2021B10  
rotation period rot_per 32.360 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]

22578 (1998 HE59)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HE59 = 1977 PL2 = 1981 SR6 = 2000 VM36 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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