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3540 Protesilaos (1973 UF5)
Classification: Jupiter Trojan          SPK-ID: 2003540
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 75 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1163801314075452 2.3557e-08  
a 5.28035623946617 8.0667e-08 au
q 4.665827686438446 1.4638e-07 au
i 23.28514420186158 8.5476e-07 deg
node 26.43305733005343 1.5662e-06 deg
peri 116.0908045349892 1.2547e-05 deg
M 236.39253328563 1.435e-05 deg
tp 2460722.222516351990
(2025-Feb-15.72251635)
0.00020467 TDB
period 4431.933769442989
12.13
0.00010156
2.781e-07
d
yr
n .08122865068113265 1.8614e-09 deg/d
Q 5.894884792493894 9.0055e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2879  
   data-arc span      24832 days (67.99 yr)  
   first obs. used      1953-02-14  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35511  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:14:40  

Additional Information
 Earth MOID = 3.74777 au 
 Jupiter MOID = .513315 au 
 T_jup = 2.823 
[ 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 9.46   n/a E2021B10  
diameter diameter 70.225 km 1.076 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 8.945 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Mottola, S.; Gonano, M.; Rebhan, H.; Neukum, G. (1990) in Asteroids, Comets, Meteors III. C.-I. Lagerkvist, H. Rickman, B.A. Lindblad, M. Lindgren, eds. Uppsala, p. 151-154.]
[French, L.M.; Stephens, R.D.; Lederer, S.M.; Coley, D.R.; Rohl, D.A. (2011) Minor Planet Bull. 38, 116-120.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.062   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

3540 Protesilaos (1973 UF5)          Discovered 1973-Oct-27 by Borngen, F. at Tautenburg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1973 UF5 = 1978 GJ2 = 1985 VO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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