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 — Asteroide in Gemini

87 Sylvia

Asteroid Gemini Visibile

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

Mappa stellare Sistema Solare 3D + Lista + Piano

Proprietà

Magnitudine 11.0

Descrizione

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.

Posizione e identificatori

RA 06h 16m 21.0s

Dec +28° 42' 01.9"

Costellazione Gemini

Catalogo Sylvia

Wikipedia

Proprietà fisiche

Diametro 261 km

Massa 1.5e19 kg

Albedo 0.05 (5% reflected)

Rotazione 5.2 hours

Dimensione angolare 0.1″ (current)

Proprietà orbitali

Semiasse maggiore 3.4845 AU (521.3 million km)

Eccentricità 0.0943

Inclinazione 10.87°

Periodo orbitale 6.50 years

Distanza 4.168 AU (34.7 light-min)

Elongazione 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.