591 Irmgard

Irmgard (minor planet designation: 591 Irmgard) is a minor planet orbiting the Sun.

591 Irmgard

Discovery
Discovered by	August Kopff
Discovery site	Heidelberg
Discovery date	14 March 1906
Designations
MPC designation	(591) Irmgard
Pronunciation	German: [ˈɪʁmɡaːt][1]
Alternative designations	1906 TP
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	110.08 yr (40205 d)
Aphelion	3.2342 AU (483.83 Gm)
Perihelion	2.1241 AU (317.76 Gm)
Semi-major axis	2.6792 AU (400.80 Gm)
Eccentricity	0.20718
Orbital period	4.39 yr (1601.8 d)
Mean anomaly	43.3627°
Mean motion	0° 13^m 29.1^s / day
Inclination	12.490°
Longitude of ascending node	334.289°
Argument of perihelion	217.191°
Physical characteristics
Mean radius	25.93±0.65 km
Rotation period	7.35 h (0.306 d)
Geometric albedo	0.0364±0.002
Absolute magnitude (H)	10.64

References

1. (German Names)
2. "591 Irmgard (1906 TP)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.

External links

• 591 Irmgard at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 591 Irmgard at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters