3564 Talthybius

3564 Talthybius

Discovery
Discovered by	Edward L. G. Bowell
Discovery date	15 October 1985
Designations
Named after	Talthybius
Alternative names	1985 TC1
Minor planet category	Jupiter Trojan
Orbital characteristics[1][2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	23841 days (65.27 yr)
Aphelion	5.42032 AU (810.868 Gm)
Perihelion	4.99427 AU (747.132 Gm)
Semi-major axis	5.20729 AU (778.999 Gm)
Eccentricity	0.040909
Orbital period	11.88 yr (4340.27 d)
Average orbital speed	13.02 km/s
Mean anomaly	345.151°
Mean motion	0° 4^m 58.599^s / day
Inclination	15.5081°
Longitude of ascending node	23.7884°
Argument of perihelion	203.341°
Earth MOID	3.99087 AU (597.026 Gm)
Jupiter MOID	0.435077 AU (65.0866 Gm)
Jupiter Tisserand parameter	2.926
Physical characteristics
Dimensions	68.9 km
Mean radius	34.46 ± 1.75 km
Mass	3.4×10^17 kg
Mean density	2.0 g/cm³
Equatorial surface gravity	0.0193 m/s²
Equatorial escape velocity	0.0364 km/s
Rotation period	40.59 h (1.691 d)
Geometric albedo	0.0934 ± 0.010
Temperature	~122 K
Absolute magnitude (H)	9.4

3564 Talthybius is a Jupiter Trojan asteroid that orbits in the L₄ Lagrangian point of the Sun-Jupiter system, in the "Greek Camp" of Trojan asteroids. It was named after the Greek hero Talthybius, who was a herald during the Trojan War. It was discovered by Edward L. G. Bowell on October 15, 1985 in Flagstaff, Arizona at the Anderson Mesa station of the Lowell Observatory.

Photometric observations of this asteroid during 1994 were used to build a light curve showing a rotation period of 40.59 ± 0.13 hours with a brightness variation of 0.38 ± 0.01 magnitude.^[3]

References

1. "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
2. "3564 Talthybius (1985 TC1)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 April 2016.
3. Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; Hahn, Gerhard; Schober, Hans-Josef; Lahulla, Felix; Delbò, Marco; Lagerkvist, Claes-Ingvar (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal 141 (5): 170. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170.

External links

• Discovery Circumstances: Numbered Minor Planets
• Orbital simulation from JPL (Java) / Ephemeris
• 3564 Talthybius at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters