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 — Asteroide in Virgo

13 Egeria

Asteroid Virgo Visibile

Rendered preview of Egeria 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: 2.576 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.

Posizione e identificatori

RA 13h 45m 26.0s

Dec -04° 55' 37.6"

Costellazione Virgo

Catalogo Egeria

Wikipedia

Proprietà fisiche

Diametro 208 km

Massa 1.0e19 kg

Albedo 0.08 (8% reflected)

Rotazione 7.0 hours

Dimensione angolare 0.2″ (current)

Proprietà orbitali

Semiasse maggiore 2.5763 AU (385.4 million km)

Eccentricità 0.0847

Inclinazione 16.53°

Periodo orbitale 4.14 years

Distanza 1.566 AU (13.0 light-min)

Elongazione 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.

Consigli per l'osservazione

Mesi migliori February , March , April

Visibilità Telescope

Dove cercare In asteroid belt

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