Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
125P/Spacewatch
Classification: Jupiter-family Comet          SPK-ID: 1000162
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2455419.5 (2010-Aug-11.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5120401837068013 5.2984e-08  
a 3.125691795120326 1.7652e-08 au
q 1.525211994136073 1.6608e-07 au
i 9.986457950401826 1.728e-05 deg
node 153.1877488061983 4.3223e-05 deg
peri 87.29359844035815 5.3698e-05 deg
M 195.6668643285223 1.6758e-05 deg
tp 2456340.883217167682
(2013-Feb-17.38321717)
9.4555e-05 TDB
period 2018.448420794883
5.53
1.7099e-05
4.681e-08
d
yr
n .1783548176367216 1.5109e-09 deg/d
Q 4.726171596104579 2.6691e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] 6.993232469304938E-11 3.037E-13
  Orbit Determination Parameters
   # obs. used (total)      799  
   data-arc span      9887 days (27.07 yr)  
   first obs. used      1991-09-08  
   last obs. used      2018-10-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64642  
   source      ORB  
   producer      Javier Roa  
   solution date      2019-May-15 16:29:23  

Additional Information
 Earth MOID = .555863 au 
 Jupiter MOID = .809919 au 
 T_jup = 2.976 
[ 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 12.6   0.6 32 2 parameter fit from 457 observations, autocmod 2.6q
comet total magnitude slope K1 17.   n/a 32 autocmod 2.6q
comet nuclear magnitude M2 16.7   0.8 32 from 167 observations, autocmod 2.6q
comet nuclear magnitude slope K2 5.   n/a 32 autocmod 2.6q
comet nuclear phase coefficient PC 0.03   n/a 32 autocmod 2.6q
diameter diameter 1.6 km n/a DASTCOM value unverified

125P/Spacewatch          Discovered 1991-Sep-08 by Gehrels, T. at Kitt Peak
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1996.6   125P/1996 F1       
 1991.0   125P/1991 R2   1990 XXIX   1991x 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Mar-05 10:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin