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

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04851155787758667 4.5195e-08  
a 5.242135442518117 8.7209e-08 au
q 4.987831285596251 2.3196e-07 au
i 27.20533017672549 4.0416e-06 deg
node 133.9634289981175 9.7083e-06 deg
peri 276.1180581624259 5.0675e-05 deg
M 187.2662850445915 5.2894e-05 deg
tp 2461103.965513615623
(2026-Mar-04.46551362)
0.00067644 TDB
period 4383.901458363871
12.00
0.0001094
2.995e-07
d
yr
n .08211863414793924 2.0492e-09 deg/d
Q 5.496439599439984 9.144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2302  
   data-arc span      15580 days (42.66 yr)  
   first obs. used      1977-12-07  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40709  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:57:31  

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 ]
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