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103P/Hartley 2
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000041
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456981.5 (2014-Nov-20.0) TDB
Reference: JPL 252 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6937804720128784 5.9767e-09  
a 3.475268743304754 1.1101e-08 AU
q 1.064195154203179 2.0454e-08 AU
i 13.6042724340803 2.132e-06 deg
node 219.7487450736021 5.8655e-06 deg
peri 181.3222857728302 6.1879e-06 deg
M 225.7701522441131 1.4848e-06 deg
tp 2457863.823030096833
(2017-Apr-20.32303010)
1.3758e-05 JED
period 2366.361104815672
6.48
1.1339e-05
3.104e-08
d
yr
n .1521323179574667 7.2896e-10 deg/d
Q 5.886342332406328 1.8803e-08 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
AJ1 [SET] 2.477513858655444E-9 n/a
AJ2 [SET] 4.256439146454415E-9 n/a
ALF [SET] 93.05206777907777 n/a
DEL [SET] -1.38277922386182 n/a
ET1 [SET] 30. n/a
ET2 [SET] 135. n/a
  Orbit Determination Parameters
   # obs. used (total)      6506  
   data-arc span      9922 days (27.16 yr)  
   first obs. used      1986-03-15  
   last obs. used      2013-05-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .68296  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Nov-10 13:49:39  

Additional Information
 Earth MOID = .0720049 AU 
 T_jup = 2.641 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 14.7 mag 1. 252 2 parameter fit from 791 observations, autocmod 2.6
comet total magnitude slope K1 8.   n/a 252 autocmod 2.6
diameter diameter 1.6 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  
rotation period rot_per 18.1 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Harmon, J.K.; Nolan, M.C; Howell, E.S.; Giorgini, J.D. (2010) CBET 2515.]
[Belton, M.J.S.; Thomas, P.; Li, J.-Y.; Williams, J.; et al. (2013) Icarus 222, 595-609.]

103P/Hartley 2          Discovered 1986-Mar-15 by Hartley, Malcolm at U. K. Schmidt Telescope Unit, Siding Spring
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1991.4   103P/1991 N1   1991 XV   1991t 
 1984.9   103P/1986 E2   1985 V   1986c 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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