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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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:
Orbital Elements at Epoch 2455530.5 (2010-Nov-30.0) TDB
Reference: JPL K173/7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6948883789281467 1.1697e-07  
a 3.46980916452526 1.4796e-06 au
q 1.058679098998275 5.099e-08 au
i 13.61926973311054 2.2786e-06 deg
node 219.7583231740731 6.3062e-06 deg
peri 181.2099869444809 8.2111e-06 deg
M 4.991761696667041 3.8751e-06 deg
tp 2455497.765315841213
(2010-Oct-28.26531584)		 6.0561e-06 TDB
period 2360.787035373048
6.46		 0.00151
4.134e-06		 d
yr
n .1524915185511908 9.7535e-08 deg/d
Q 5.880939230052245 2.5077e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 7.81473130558195E-10 4.823E-11
A2 [EST] 2.539602225693799E-10 1.473E-12
   Orbit Determination Parameters
   # obs. used (total)      6097  
   data-arc span      5313 days (14.55 yr)  
   first obs. used      2004-09-20  
   last obs. used      2019-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .54139  
   source      ORB  
   producer      Javier Roa  
   solution date      2019-May-15 16:14:27  

Additional Information
 Earth MOID = .0666239 au 
 Jupiter MOID = .269774 au 
 T_jup = 2.641 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 14.2   1. K173/7 from 594 observations, assumed slope, autocmod 2.6q
comet total magnitude slope K1 15.   n/a K173/7 autocmod 2.6q
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 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:
[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

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Alternate Designations
 Perihelion 
Year (est.)		  New-Style 
Desig		 Roman
 Numeral 		 Year/
 Letter 
 1991.4   103P/1991 N1   1991 XV   1991t 
 1985.0   103P/1986 E2   1985 V   1986c 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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