What telescope do I need to see Amphitrite?

At magnitude 9.0, Amphitrite is within reach of a 3-inch (80 mm) telescope from a moderate-Bortle site.

Amphitrite — Asteroide en Ophiuchus

29 Amphitrite

Asteroid Ophiuchus Visible

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

Mapa Estelar Sistema Solar 3D + Lista + Plan

Propiedades

Magnitud 9.0

Descripción

Type: Asteroid

Distance: 2.554 AU

Orbital Period: 1490.9 days

Diameter: 190 km

Greek goddess of the sea, wife of Poseidon; S-type; one of the brightest minor planets at opposition (typical mag 9.0).

Posición e Identificadores

RA 16h 42m 01.4s

Dec -30° 29' 06.2"

Constelación Ophiuchus

Catálogo Amphitrite

Wikipedia

Propiedades Físicas

Diámetro 190 km

Masa 8.9e18 kg

Albedo 0.22 (22% reflected)

Rotación 5.4 hours

Tamaño angular 0.1″ (current)

Propiedades orbitales

Semieje mayor 2.5541 AU (382.1 million km)

Excentricidad 0.0734

Inclinación 6.08°

Período orbital 4.08 years

Distancia 1.848 AU (15.4 light-min)

Elongación 146.0° 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.