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 in Ophiuchus

48 Doris

Asteroid Ophiuchus Visibile

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

Mappa stellare Sistema Solare 3D + Lista + Piano

Proprietà

Magnitudine 10.4

Descrizione

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.

Posizione e identificatori

RA 17h 06m 08.3s

Dec -14° 56' 46.9"

Costellazione Ophiuchus

Catalogo Doris

Wikipedia

Proprietà fisiche

Diametro 222 km

Massa 1.0e19 kg

Albedo 0.06 (6% reflected)

Rotazione 11.9 hours

Dimensione angolare 0.1″ (current)

Proprietà orbitali

Semiasse maggiore 3.1129 AU (465.7 million km)

Eccentricità 0.0663

Inclinazione 6.56°

Periodo orbitale 5.49 years

Distanza 2.462 AU (20.5 light-min)

Elongazione 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.