What telescope do I need to see Fortuna?

At magnitude 10.2, Fortuna is best observed with a 6-inch (150 mm) or larger telescope.

Fortuna — Astéroïde dans Lion

19 Fortuna

Asteroid Lion (Leo) Visible

Rendered preview of Fortuna from the Nightbase orrery, lit from the current Sun direction with the terminator visible.

Carte du Ciel Système Solaire 3D + Liste + Plan

Propriétés

Magnitude 10.2

Description

Type: Asteroid

Distance: 2.442 AU

Orbital Period: 1393.9 days

Diameter: 200 km

Roman goddess of fortune and luck; G-type; one of the brightest minor planets at opposition (typical mag 10.2).

Position et Identifiants

RA 11h 01m 11.0s

Dec +05° 09' 54.0"

Constellation Lion (Leo)

Catalogue Fortuna

Wikipedia

Propriétés Physiques

Diamètre 200 km

Masse 1.0e19 kg

Albédo 0.04 (4% reflected)

Rotation 7.4 hours

Taille angulaire 0.1″ (current)

Propriétés orbitales

Demi-grand axe 2.4421 AU (365.3 million km)

Excentricité 0.1580

Inclinaison 1.57°

Période orbitale 3.82 years

Distance 2.053 AU (17.1 light-min)

Élongation 124.5° Good

Brightness Forecast (next 12 months)

Apparent magnitude as Earth–asteroid distance changes through the year. The peak marks the brightest moment in the window — usually around opposition, when the asteroid is closest and fully illuminated.

Computed from JPL orbital elements via m = H + 5·log₁₀(r·Δ). Phase-function correction is omitted, so curves trace distance variation only — accurate within a few tenths for main-belt asteroids; coarse for fast-moving NEOs near Earth.