299 Thora

Picture of the Day · NASA

NGC 3660 and Burçin's Galaxy

2026-05-26

The upper galaxy might be more photogenic, but the lower galaxy is more unusual. The galaxy up top is NGC 3660, a spiral galaxy similar to our own Milky Way galaxy in that it has several bright blue spiral arms and a central bar of stars, dust, and gas. Captured by chance in the featured deep and colorful image, surprisingly, is SN 2026cff, a supernova found just to the right of the central bar. Farther in the distance is the bottom galaxy, known informally as Burçin’s galaxy, but formally cataloged as LEDA 1000714. The center of this galaxy appears to be an old elliptical galaxy, but it is strangely surrounded by not one but two rings of stars. What created Burçin's galaxy is a mystery and remains a continuing topic of research, but it likely involves the accretion of one or more smaller galaxies.

via NASA APOD

Key facts

Perihelion

2.28 AU (341.48 Gm)

Semi major axis

2.43 AU (364.09 Gm)

Orbital period sidereal

3.80 yr (1,386.8 d)

Mean anomaly

40.9107 °

Mean motion

0° 15 34.52 / day

Inclination

1.60383°

Longitude of ascending node

241.531°

Argument of perihelion

150.672°

Dimensions

17.06 ± 1.5 km

Synodic rotation period

274 h (11.4 d )

Geometric albedo

0.1673 ± 0.033

Discovered by

Johann Palisa

Discovery date

6 October 1890

Wikidata facts

Instance of

asteroid

Named after

Thor

Followed by

Q150557

Follows

298 Baptistina

Parent body

Sun

Minor-planet group

asteroid belt

Diameter

+15.757

Orbital period

+1386.908522448052

Image

Орбита астероида 299.png