What telescope do I need to see Parthenope?

At magnitude 9.5, Parthenope is within reach of a 3-inch (80 mm) telescope from a moderate-Bortle site.

Parthenope — Asteroide en León

11 Parthenope

Asteroid León (Leo) Visible

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

Mapa Estelar Sistema Solar 3D + Lista + Plan

Propiedades

Magnitud 9.5

Descripción

Type: Asteroid

Distance: 2.453 AU

Orbital Period: 1403.4 days

Diameter: 143 km

Greek siren who lured sailors to their deaths in Homer's Odyssey; S-type; one of the brightest minor planets at opposition (typical mag 9.5).

Posición e Identificadores

RA 10h 13m 28.3s

Dec +15° 22' 32.1"

Constelación León (Leo)

Catálogo Parthenope

Wikipedia

Propiedades Físicas

Diámetro 143 km

Masa 3.8e18 kg

Albedo 0.19 (19% reflected)

Rotación 13.7 hours

Tamaño angular 0.1″ (current)

Propiedades orbitales

Semieje mayor 2.4532 AU (367.0 million km)

Excentricidad 0.1005

Inclinación 4.64°

Período orbital 3.84 years

Distancia 2.147 AU (17.9 light-min)

Elongación 109.8° 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.