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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
84P/Giclas
Classification: Jupiter-family Comet          SPK-ID: 1000033
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2454655.5 (2008-Jul-08.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4927078894965374 5.2958e-07  
a 3.646377628853794 5.7297e-08 au
q 1.849778603033853 1.952e-06 au
i 7.281512688227041 1.4932e-05 deg
node 112.4720674809058 7.3658e-05 deg
peri 276.2615127158606 0.00015424 deg
M 99.15430633234178 2.936e-05 deg
tp 2453955.013174268545
(2006-Aug-07.51317427)
0.00019358 TDB
period 2543.260767899399
6.96
5.9945e-05
1.641e-07
d
yr
n .1415505655353388 3.3364e-09 deg/d
Q 5.442976654673735 8.5528e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 4.291901471361834E-10 1.025E-10
A2 [EST] -2.323975155849856E-11 4.565E-13
  Orbit Determination Parameters
   # obs. used (total)      1261  
   data-arc span      12985 days (35.55 yr)  
   first obs. used      1978-09-03  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64559  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2017-Jun-08 16:15:29  

Additional Information
 Earth MOID = .871226 au 
 Jupiter MOID = .552254 au 
 T_jup = 2.872 
[ hide covariance matrix ]
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 2.804534011559827E-13 -1.033658113191569E-12 -5.923830343037391E-11 4.500586090640605E-12 -6.529536775357841E-11 -2.122008492516275E-12 4.728349321636458E-17 -1.3261793533602E-19
q -1.033658113191569E-12 3.810132500906431E-12 2.206477360807636E-10 -1.651906309687774E-11 2.41467570980315E-10 7.790436694290087E-12 -1.748785297611339E-16 4.925362066666586E-19
tp -5.923830343037391E-11 2.206477360807636E-10 3.747498160916293E-8 -1.083295997861236E-9 2.278184534501136E-8 1.98445635531541E-10 -1.571931490013996E-14 3.293351657738931E-17
node 4.500586090640605E-12 -1.651906309687774E-11 -1.083295997861236E-9 5.425507463743234E-9 -6.419447351015501E-9 -8.39276803503872E-10 2.393223794602508E-16 -2.471835950396684E-18
peri -6.529536775357841E-11 2.41467570980315E-10 2.278184534501136E-8 -6.419447351015501E-9 2.378999451016464E-8 1.21097237760392E-9 -1.246098979336801E-14 3.487299667016421E-17
i -2.122008492516275E-12 7.790436694290087E-12 1.98445635531541E-10 -8.39276803503872E-10 1.21097237760392E-9 2.229603621448308E-10 -2.077384436307104E-16 1.33257215721464E-18
A1 4.728349321636458E-17 -1.748785297611339E-16 -1.571931490013996E-14 2.393223794602508E-16 -1.246098979336801E-14 -2.077384436307104E-16 1.049786082588689E-20 -1.547731407705212E-23
A2 -1.3261793533602E-19 4.925362066666586E-19 3.293351657738931E-17 -2.471835950396684E-18 3.487299667016421E-17 1.33257215721464E-18 -1.547731407705212E-23 2.084217433848416E-25

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 11.9   1. 39 from 358 observations, assumed slope, autocmod 2.6i
comet total magnitude slope K1 15.   n/a 39 autocmod 2.6i
comet nuclear magnitude M2 15.3   0.8 39 from 676 observations, autocmod 2.6i
comet nuclear magnitude slope K2 5.   n/a 39 autocmod 2.6i
comet nuclear phase coefficient PC 0.03   n/a 39 autocmod 2.6i
diameter diameter 1.80 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

84P/Giclas          Discovered 1978-Sep-08 by Giclas, Henry L. at Lowell Observatory
First known observation: 1978/09/03
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1992.7       1992 XXV   1992l 
 1985.7   84P/1985 M1   1985 XV   1985g 
 1978.7   84P/1978 R2   1978 XXII   1978k 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-May-25 02:06 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin