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 — Astéroïde dans Aries

89 Julia

Asteroid Aries Visible

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

Carte du Ciel Système Solaire 3D + Liste + Plan

Propriétés

Magnitude 9.4

Description

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).

Position et Identifiants

RA 02h 40m 47.6s

Dec +27° 13' 33.3"

Constellation Aries

Catalogue Julia

Wikipedia

Propriétés Physiques

Diamètre 145 km

Masse 4.0e18 kg

Albédo 0.19 (19% reflected)

Rotation 11.4 hours

Taille angulaire 0.1″ (current)

Propriétés orbitales

Demi-grand axe 2.5508 AU (381.6 million km)

Excentricité 0.1838

Inclinaison 16.12°

Période orbitale 4.07 years

Distance 3.187 AU (26.5 light-min)

Élongation 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.