492 Gismonda

492 Gismonda is a main belt asteroid discovered by German astronomer Max Wolf in 1902. Gismonda is named after the daughter of Tancred, prince of Salerno, from Giovanni Boccaccio's work, The Decameron.^[2] It is orbiting 3.11 AU (466 Gm) from the Sun with a period of 5.49 yr and an orbital eccentricity (ovalness) of 0.18. The orbital plane is inclined at an angle of 1.6° to the plane of the ecliptic.^[1]

492 Gismonda

Discovery
Discovered by	Max Wolf
Discovery site	Heidelberg Observatory
Discovery date	3 September 1902
Designations
MPC designation	(492) Gismonda
Pronunciation	/dʒɪzˈmɒndə/
Alternative designations	1902 JR
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	113.62 yr (41499 d)
Aphelion	3.6662 AU (548.46 Gm)
Perihelion	2.5610 AU (383.12 Gm)
Semi-major axis	3.1136 AU (465.79 Gm)
Eccentricity	0.17747
Orbital period (sidereal)	5.49 yr (2,006.7 d)
Mean anomaly	267.617°
Mean motion	0° 10m 45.84s / day
Inclination	1.6188°
Longitude of ascending node	46.215°
Argument of perihelion	296.611°
Physical characteristics
Mean radius	25.845±0.7 km
Synodic rotation period	6.488 h (0.2703 d)
Geometric albedo	0.0795±0.005
Absolute magnitude (H)	9.9

This asteroid is a member of the Themis collisional family, which is one of the largest such groups in the belt. It has an estimated diameter of 50.3±1.1 km. The spectrum suggests the surface is covered with a fine grained silicate mantle.^[3] Photometric observations of Gismonda made in 1902 produce a light curve displaying a rotation period of 6.488±0.005 h with a brightness variation of 0.16±0.02 in magnitude^[4]