What telescope do I need to see Euphrosyne?

At magnitude 10.6, Euphrosyne is best observed with a 6-inch (150 mm) or larger telescope.

Euphrosyne — Asteroid in Sagittarius

31 Euphrosyne

Magnitude 10.6^m Asteroid Sagittarius Visible

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

Star Map 3D Solar System + List + Plan

Properties

Magnitude 10.6

Description

Type: Asteroid

Distance: 3.162 AU

Orbital Period: 2053.2 days

Diameter: 268 km

Greek goddess of mirth; C-type with very dark surface. Highly inclined orbit (26°) keeps it well off the ecliptic. Parent of the Euphrosyne family.

Position & Identifiers

RA 18h 37m 45.6s

Dec -54° 38' 51.5"

Constellation Sagittarius

Catalog Euphrosyne

Wikipedia

Physical Properties

Diameter 268 km

Mass 1.7e19 kg

Albedo 0.05 (5% reflected)

Rotation 5.5 hours

Angular Size 0.1″ (current)

Orbital Properties

Semi-major Axis 3.1615 AU (473.0 million km)

Eccentricity 0.2159

Inclination 26.31°

Orbital Period 5.62 years

Distance 2.954 AU (24.6 light-min)

Elongation 146.6° 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.

Observing Tips

Best Months April , May , June

Visibility Telescope

Where to Look In asteroid belt

Notes Greek goddess of mirth; C-type with very dark surface. Highly inclined orbit (26°) keeps it well off the ecliptic. Parent of the Euphrosyne family.