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 in Scorpius

29 Amphitrite

Magnitudine 9.0^m Asteroid Scorpius Visibile

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

Mappa stellare Sistema Solare 3D + Lista + Piano

Proprietà

Magnitudine 9.0

Descrizione

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).

Posizione e identificatori

RA 15h 58m 06.9s

Dec -29° 46' 37.4"

Costellazione Scorpius

Catalogo Amphitrite

Wikipedia

Proprietà fisiche

Diametro 190 km

Massa 8.9e18 kg

Albedo 0.22 (22% reflected)

Rotazione 5.4 hours

Dimensione angolare 0.1″ (current)

Proprietà orbitali

Semiasse maggiore 2.5541 AU (382.1 million km)

Eccentricità 0.0734

Inclinazione 6.08°

Periodo orbitale 4.08 years

Distanza 1.772 AU (14.7 light-min)

Elongazione 157.0° Near opposition

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.