What telescope do I need to see Doris?

At magnitude 10.4, Doris is best observed with a 6-inch (150 mm) or larger telescope.

Doris — Asteroide em Ophiuchus

48 Doris

Asteroid Ophiuchus Visível

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

Mapa Estelar Sistema Solar 3D + Lista + Plano

Propriedades

Magnitude 10.4

Descrição

Type: Asteroid

Distance: 3.113 AU

Orbital Period: 2006.0 days

Diameter: 222 km

Sea-nymph daughter of Oceanus; C-type, low albedo, outer-belt orbit at 3.11 AU.

Posição e Identificadores

RA 17h 06m 08.3s

Dec -14° 56' 46.9"

Constelação Ophiuchus

Catálogo Doris

Wikipedia

Propriedades Físicas

Diâmetro 222 km

Massa 1.0e19 kg

Albedo 0.06 (6% reflected)

Rotação 11.9 hours

Tamanho angular 0.1″ (current)

Propriedades orbitais

Semieixo maior 3.1129 AU (465.7 million km)

Excentricidade 0.0663

Inclinação 6.56°

Período orbital 5.49 years

Distância 2.462 AU (20.5 light-min)

Elongação 142.3° 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.