4057 Demophon information

4057 Demophon
Discovery
Discovered by	E. Bowell
Discovery site	Anderson Mesa Stn.
Discovery date	15 October 1985
Designations
MPC designation	(4057) Demophon
Pronunciation	/ˈdɛməfɒn/
Named after	Demophon of Athens ; (Greek mythology)
Alternative designations	1985 TQ
Minor planet category	Jupiter trojan ; Greek · background
Adjectives	Demophontian
Orbital characteristics
	Epoch 23 March 2018 (JD 2458200.5)
	Uncertainty parameter 0
Observation arc	32.65 yr (11,927 d)
Aphelion	5.8832 AU
Perihelion	4.6425 AU
Semi-major axis	5.2628 AU
Eccentricity	0.1179
Orbital period (sidereal)	12.07 yr (4,410 d)
Mean anomaly	197.56°
Mean motion	0° 4m 53.76s / day
Inclination	2.8706°
Longitude of ascending node	24.383°
Argument of perihelion	58.875°
Jupiter MOID	0.0724 AU
TJupiter	2.9840
Physical characteristics
Mean diameter	45.68±6.58 km; 53.16 km (calculated)
Synodic rotation period	29.82±0.24 h
Geometric albedo	0.057 (assumed); 0.077±0.015
Spectral type	C (assumed); V–I = 1.060±0.037
Absolute magnitude (H)	10.1

4057 Demophon /ˈdɛməfɒn/ is a larger Jupiter trojan from the Greek camp, approximately 46 kilometers (29 miles) in diameter. It was discovered on 15 October 1985 by American astronomer Edward Bowell at the Anderson Mesa Station of the Lowell Observatory near Flagstaff, Arizona.^[1] The dark Jovian asteroid has a longer-than-average rotation period of 29.8 hours.^[7] It was named after the Athen prince Demophon who fought in the Trojan War.^[1]

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^ Noah Webster (1884) A Practical Dictionary of the English Language
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[2] Noah Webster (1884) A Practical Dictionary of the English Language

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[AstDys-object-5] Cite error: The named reference AstDys-object was invoked but never defined (see the help page).

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[Ryan-2017-8] Cite error: The named reference Ryan-2017 was invoked but never defined (see the help page).

4057 Demophon information

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