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 — Asteroid in Aries

89 Julia

Asteroid Aries Sichtbar

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

Sternkarte 3D-Sonnensystem + Liste + Plan

Eigenschaften

Helligkeit 9.4

Beschreibung

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 & Bezeichnungen

RA 02h 40m 48.0s

Dec +27° 13' 35.0"

Sternbild Aries

Katalog Julia

Wikipedia

Physikalische Eigenschaften

Durchmesser 145 km

Masse 4.0e18 kg

Albedo 0.19 (19% reflected)

Rotation 11.4 hours

Winkeldurchmesser 0.1″ (current)

Bahneigenschaften

Große Halbachse 2.5508 AU (381.6 million km)

Exzentrizität 0.1838

Bahnneigung 16.12°

Umlaufzeit 4.07 years

Entfernung 3.187 AU (26.5 light-min)

Elongation 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.