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 ]  
2895 Memnon (1981 AE1)
Classification: Jupiter Trojan          SPK-ID: 2002895
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04851156004738476 4.5691e-08  
a 5.242135445380126 8.7645e-08 au
q 4.987831276945044 2.3351e-07 au
i 27.20532947735717 4.2165e-06 deg
node 133.9634285240163 9.7421e-06 deg
peri 276.118056161635 5.1351e-05 deg
M 187.266287088376 5.3361e-05 deg
tp 2461103.965490450048
(2026-Mar-04.46549045)
0.00068122 TDB
period 4383.901461954038
12.00
0.00010994
3.01e-07
d
yr
n .08211863408068872 2.0595e-09 deg/d
Q 5.496439613815207 9.1897e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2192  
   data-arc span      15533 days (42.53 yr)  
   first obs. used      1977-12-07  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4155  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:51:03  

Additional Information
 Earth MOID = 4.12041 au 
 Jupiter MOID = .126689 au 
 T_jup = 2.776 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.1   n/a MPO492784  
diameter diameter 56.706 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 7.516 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Binzel, R.P.; Sauter, L.M. (1992) Icarus 95, 222-238.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2015) Minor Planet Bull. 42, 216-224.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 265-270.]
[Stephens, R.D.; Coley, D.R. (2017) Minor Planet Bull. 44, 252-257.]
[Stephens, R.D.; Warner, B.D. (2018) Minor Planet Bull. 45, 343-347.]
geometric albedo albedo 0.060   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

2895 Memnon (1981 AE1)          Discovered 1981-Jan-10 by Thomas, N. G. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 AE1 = 1981 CL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-14 17:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin