Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456717.5 (2014-Mar-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5123227175298782 8.1288e-08  
a 3.127091883587495 1.2252e-07 AU
q 1.525011671822324 2.1305e-07 AU
i 9.987206495466085 2.0212e-05 deg
node 153.1883881600926 4.6183e-05 deg
peri 87.19442972903114 6.0252e-05 deg
M 67.20407197956034 2.0998e-05 deg
tp 2456340.446932856023
(2013-Feb-16.94693286)
0.00011312 JED
period 2019.804755478445
5.53
0.00011871
3.25e-07
d
yr
n .1782350492162914 1.0475e-08 deg/d
Q 4.729172095352666 1.853e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] 7.008802402243992E-11 7.14E-13
  Orbit Determination Parameters
   # obs. used (total)      477  
   data-arc span      8042 days (22.02 yr)  
   first obs. used      1991-09-08  
   last obs. used      2013-09-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .67086  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Feb-19 14:52:22  

Additional Information
 Earth MOID = .555656 AU 
 T_jup = 2.975 
[ 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 12.9 mag 0.7 24 2 parameter fit from 234 observations, autocmod 2.5c
comet total magnitude slope K1 16.   n/a 24 autocmod 2.5c
comet nuclear magnitude M2 16.5 mag 0.8 24 from 92 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 24 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 24 autocmod 2.5c
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 
 1996.5   125P/1996 F1       
 1991.0   125P/1991 R2   1990 XXIX   1991x 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Nov-29 06:16 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin