What telescope do I need to see Egeria?

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

Egeria — Astéroïde dans Virgo

13 Egeria

Asteroid Virgo Visible

Rendered preview of Egeria 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: 2.576 AU

Orbital Period: 1510.4 days

Diameter: 208 km

Greek water nymph; G-type (carbonaceous subgroup) — dark, damp surface thought to contain hydrated minerals. One of the brightest C-complex asteroids.

Position et Identifiants

RA 13h 45m 26.0s

Dec -04° 55' 37.7"

Constellation Virgo

Catalogue Egeria

Wikipedia

Propriétés Physiques

Diamètre 208 km

Masse 1.0e19 kg

Albédo 0.08 (8% reflected)

Rotation 7.0 hours

Taille angulaire 0.2″ (current)

Propriétés orbitales

Demi-grand axe 2.5763 AU (385.4 million km)

Excentricité 0.0847

Inclinaison 16.53°

Période orbitale 4.14 years

Distance 1.566 AU (13.0 light-min)

Élongation 165.3° Near opposition

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.

Conseils d'Observation

Meilleurs mois February , March , April

Visibilité Telescope

Où chercher In asteroid belt

Notes Greek water nymph; G-type (carbonaceous subgroup) — dark, damp surface thought to contain hydrated minerals. One of the brightest C-complex asteroids.