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 — Asteroide in Leone

19 Fortuna

Asteroid Leone (Leo) Visibile

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

Mappa stellare Sistema Solare 3D + Lista + Piano

Proprietà

Magnitudine 10.2

Descrizione

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).

Posizione e identificatori

RA 11h 01m 11.0s

Dec +05° 09' 54.0"

Costellazione Leone (Leo)

Catalogo Fortuna

Wikipedia

Proprietà fisiche

Diametro 200 km

Massa 1.0e19 kg

Albedo 0.04 (4% reflected)

Rotazione 7.4 hours

Dimensione angolare 0.1″ (current)

Proprietà orbitali

Semiasse maggiore 2.4421 AU (365.3 million km)

Eccentricità 0.1580

Inclinazione 1.57°

Periodo orbitale 3.82 years

Distanza 2.053 AU (17.1 light-min)

Elongazione 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.