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 — Astéroïde dans Ophiuchus

29 Amphitrite

Asteroid Ophiuchus Visible

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

Carte du Ciel Système Solaire 3D + Liste + Plan

Propriétés

Magnitude 9.0

Description

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).

Position et Identifiants

RA 16h 42m 03.5s

Dec -30° 29' 00.5"

Constellation Ophiuchus

Catalogue Amphitrite

Wikipedia

Propriétés Physiques

Diamètre 190 km

Masse 8.9e18 kg

Albédo 0.22 (22% reflected)

Rotation 5.4 hours

Taille angulaire 0.1″ (current)

Propriétés orbitales

Demi-grand axe 2.5541 AU (382.1 million km)

Excentricité 0.0734

Inclinaison 6.08°

Période orbitale 4.08 years

Distance 1.848 AU (15.4 light-min)

Élongation 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.