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 — Gemini의 소행성

87 Sylvia

Asteroid Gemini 관측 가능

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

성도 3D 태양계 + 목록 + 계획

특성

등급 11.0

설명

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.

위치 & 식별자

RA 06h 16m 21.0s

Dec +28° 42' 01.9"

별자리 Gemini

카탈로그 Sylvia

Wikipedia

물리적 특성

직경 261 km

질량 1.5e19 kg

알베도 0.05 (5% reflected)

자전 5.2 hours

시직경 0.1″ (current)

궤도 요소

긴반지름 3.4845 AU (521.3 million km)

이심률 0.0943

궤도경사 10.87°

공전주기 6.50 years

거리 4.168 AU (34.7 light-min)

이각 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.

관측 팁

관측 적기 August , September , October

가시성 Telescope

관측 위치 In asteroid belt

참고 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.

발견

발견자 Norman Robert Pogson

발견일 1866-05-16

현재 천체력

4.168

AU from Earth

623.6M

0.1″

시직경

54°

이각

관측 난이도

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망원경	보틀 3	보틀 4	보틀 5
80 mm 굴절 80mm 굴절	어려움+	어려움	극난+
150 mm 뉴턴 150mm 뉴턴	보통+	보통	어려움+
Celestron C8 (203 mm SCT) C8 203mm	보통+	보통+	보통