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 ]  
12225 Yanfernandez (1985 PQ)
Classification: Main-belt Asteroid          SPK-ID: 2012225
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1940980659425048 2.5568e-08  
a 2.213289468293104 6.3243e-09 au
q 1.783694263126498 5.6013e-08 au
i 4.767096287217331 3.614e-06 deg
node 153.6632312929034 3.6159e-05 deg
peri 116.3429379518249 3.7554e-05 deg
M 244.5893466055876 1.2031e-05 deg
tp 2459386.066374793547
(2021-Jun-20.56637479)		 4.0959e-05 TDB
period 1202.695685738117
3.29		 5.1549e-06
1.411e-08		 d
yr
n .2993275890725933 1.283e-09 deg/d
Q 2.64288467345971 7.5518e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2282  
   data-arc span      15348 days (42.02 yr)  
   first obs. used      1978-05-06  
   last obs. used      2020-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48535  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:54:24  

Additional Information
 Earth MOID = .773919 au 
 Jupiter MOID = 2.46718 au 
 T_jup = 3.626 
[ 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 14.2   n/a MPO452342  
diameter diameter 4.078 km 0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.222   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12225 Yanfernández           Discovered 1985 Aug. 14 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Yanga R. Fernández (b. 1971) completed his thesis on the albedo and size distribution of cometary nuclei at the University of Maryland in 1999. Since then, at the University of Hawaii, he has measured albedos of other small bodies, recovered comets and discovered new jovian satellites. The name was suggested by M. F. A'Hearn.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011130/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1985 PQ = 1978 JM1 = 1991 ED1 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Dec-03 20:27 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin