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 ]  
5144 Achates (1991 XX)
Classification: Jupiter Trojan          SPK-ID: 2005144
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2710394310260276 5.5109e-08  
a 5.206941406912277 9.0252e-08 AU
q 3.79565497059691 2.9006e-07 AU
i 8.900873858008971 5.0932e-06 deg
node 322.8291579607657 3.6233e-05 deg
peri 331.5228251342371 3.696e-05 deg
M 115.5803276674431 1.0368e-05 deg
tp 2455607.170335788953
(2011-Feb-14.67033579)
0.00012145 JED
period 4339.827453675476
11.88
0.00011283
3.089e-07
d
yr
n .08295260672059893 2.1567e-09 deg/d
Q 6.618227843227643 1.1471e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      1153  
   data-arc span      23978 days (65.65 yr)  
   first obs. used      1949-05-04  
   last obs. used      2014-12-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52733  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:10:52  

Additional Information
 Earth MOID = 2.78454 AU 
 T_jup = 2.902 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.0 mag n/a MPO253398  
diameter diameter 91.91 km 5.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
rotation period rot_per 5.958 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Published Reference List:
[Molnar, L.A.; Haegert, M.J.; Hoogenboom, K.M. (2008) Minor Planet Bul. 35, 82-84.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
geometric albedo albedo 0.0576   0.007 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5

5144 Achates (1991 XX)          Discovered 1991-Dec-02 by Shoemaker, C. S. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1991 XX = 1939 PC = 1951 PK = 1975 QA = 1987 QV11 = 1988 SS4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Mar-03 15:03 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin