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 ]  
172974 (2005 YW55)
Classification: Amor [NEO]          SPK-ID: 2172974
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2467798209092737 1.2276e-07  
a 1.636841354169943 3.7601e-08 au
q 1.232901937930991 2.235e-07 au
i 8.472948166122364 1.1638e-05 deg
node 239.415284873366 4.9282e-05 deg
peri 256.6332707510379 6.0751e-05 deg
M 301.7522317219728 0.00010104 deg
tp 2459124.261367548261
(2020-Oct-01.76136755)
0.00021887 TDB
period 764.9064270532918
2.09
2.6357e-05
7.216e-08
d
yr
n .4706458035486194 1.6217e-08 deg/d
Q 2.040780770408894 4.688e-08 au
  Orbit Determination Parameters
   # obs. used (total)      195  
   data-arc span      6216 days (17.02 yr)  
   first obs. used      2002-06-04  
   last obs. used      2019-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51291  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jun-22 05:56:35  

Additional Information
 Earth MOID = .29272 au 
 Jupiter MOID = 3.03798 au 
 T_jup = 4.254 
[ 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
absolute magnitude H 19.3   n/a MPO211265  

172974 (2005 YW55)          Discovered 2005-Dec-28 by CSS at Catalina
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ show close-approach data ]
Alternate Designations
 2005 YW55 = 2004 HF54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-25 12:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin