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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 67 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1163365186664636 5.7595e-08  
a 5.279333529374008 9.5341e-08 au
q 4.665154245687502 3.0021e-07 au
i 23.28749296443565 6.2968e-06 deg
node 26.4301436147135 1.3168e-05 deg
peri 116.2495827871135 2.8603e-05 deg
M 219.9557366353812 2.7571e-05 deg
tp 2460724.073863111661
(2025-Feb-17.57386311)
0.00036771 TDB
period 4430.646252925771
12.13
0.00012002
3.286e-07
d
yr
n .08125225519014849 2.201e-09 deg/d
Q 5.893512813060514 1.0643e-07 au
  Orbit Determination Parameters
   # obs. used (total)      2366  
   data-arc span      24429 days (66.88 yr)  
   first obs. used      1953-02-14  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37988  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 19:06:56  

Additional Information
 Earth MOID = 3.74699 au 
 Jupiter MOID = .514299 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 9.3   n/a MPO302084  
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. 2019-August); 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.]
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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