What telescope do I need to see Julia?

At magnitude 9.4, Julia is within reach of a 3-inch (80 mm) telescope from a moderate-Bortle site.

Julia — Asteroide in Aries

89 Julia

Asteroid Aries Visibile

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

Mappa stellare Sistema Solare 3D + Lista + Piano

Proprietà

Magnitudine 9.4

Descrizione

Type: Asteroid

Distance: 2.551 AU

Orbital Period: 1488.1 days

Diameter: 145 km

Named after Saint Julia of Corsica; S-type; one of the brightest minor planets at opposition (typical mag 9.4).

Posizione e identificatori

RA 02h 40m 47.6s

Dec +27° 13' 33.5"

Costellazione Aries

Catalogo Julia

Wikipedia

Proprietà fisiche

Diametro 145 km

Massa 4.0e18 kg

Albedo 0.19 (19% reflected)

Rotazione 11.4 hours

Dimensione angolare 0.1″ (current)

Proprietà orbitali

Semiasse maggiore 2.5508 AU (381.6 million km)

Eccentricità 0.1838

Inclinazione 16.12°

Periodo orbitale 4.07 years

Distanza 3.187 AU (26.5 light-min)

Elongazione 12.8° Near Sun

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.