What telescope do I need to see Sylvia?

At magnitude 11.0, Sylvia is best observed with a 6-inch (150 mm) or larger telescope.

Sylvia — Astéroïde dans Gemini

87 Sylvia

Asteroid Gemini Visible

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

Carte du Ciel Système Solaire 3D + Liste + Plan

Propriétés

Magnitude 11.0

Description

Type: Asteroid

Distance: 3.485 AU

Orbital Period: 2375.8 days

Diameter: 261 km

X/P-type triple system — orbited by two small moons, Romulus (2001) and Remus (2004). Outer-belt orbit at 3.48 AU; very dark, reddish surface.

Position et Identifiants

RA 06h 16m 21.0s

Dec +28° 42' 01.9"

Constellation Gemini

Catalogue Sylvia

Wikipedia

Propriétés Physiques

Diamètre 261 km

Masse 1.5e19 kg

Albédo 0.05 (5% reflected)

Rotation 5.2 hours

Taille angulaire 0.1″ (current)

Propriétés orbitales

Demi-grand axe 3.4845 AU (521.3 million km)

Excentricité 0.0943

Inclinaison 10.87°

Période orbitale 6.50 years

Distance 4.168 AU (34.7 light-min)

Élongation 53.9° Moderate

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.