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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
P/2017 Y3 (Leonard)
Classification: Halley-type Comet* [NEO]          SPK-ID: 1003554
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458169.5 (2018-Feb-20.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8707108805845301 1.2146e-05  
a 9.864564471424249 0.00094511 au
q 1.275380853927572 3.0307e-06 au
i 27.58565185691802 5.8414e-05 deg
node 153.8739129853849 0.0001167 deg
peri 67.52878617230991 0.00023461 deg
M .2780386104303014 4.5473e-05 deg
tp 2458160.759869669226
(2018-Feb-11.25986967)
0.00023897 TDB
period 11316.58266529637
30.98
1.6263
0.004453
d
yr
n .03181172361370029 4.5718e-06 deg/d
Q 18.45374808892092 0.001768 au
  Orbit Determination Parameters
   # obs. used (total)      93  
   data-arc span      265 days  
   first obs. used      2017-12-26  
   last obs. used      2018-09-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .64057  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:39  

Additional Information
 Earth MOID = .491091 au 
 Jupiter MOID = .440639 au 
 T_jup = 1.728 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 16.5   0.6 9 2 parameter fit from 72 observations, autocmod 2.9c
comet total magnitude slope K1 11.   n/a 9 autocmod 2.9c
comet nuclear magnitude M2 18.6   0.05 9 from 3 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 9 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 9 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2018.1   P/2017 Y3       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-22 09:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin