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
- Discovered by
- J. Palisa
- Discovery site
- Vienna
- Discovery date
- 16 August 1909
- Alternative designations
- 1909 HG
- Observation arc
- 97.38 yr (35569 d)
- Aphelion
- 3.4628 AU (518.03 Gm )
- Perihelion
- 1.9794 AU (296.11 Gm)
- Semi major axis
- 2.7211 AU (407.07 Gm)
- Orbital period sidereal
- 4.49 yr (1639.5 d )
- Mean anomaly
- 260.701 °
- Mean motion
- 0° 13 10.488 / day
- Inclination
- 14.878°
- Longitude of ascending node
- 334.346°
Wikidata facts
- Instance of
- asteroid
- Followed by
- Q156507
- Follows
- Q156493
- Parent body
- Sun
- Minor-planet group
- asteroid belt
- Diameter
- +21.533
- Orbital period
- +1641.97226965818
- Image
- Орбита астероида 687.png
Show 4 more facts
Article
687 Tinette is a minor planet, specifically an asteroid orbiting primarily in the asteroid belt. It was discovered by Austrian astronomer Johann Palisa on 16 August 1909 from Vienna and was given the preliminary designation 1909 HG.
Photometric observations at the Palmer Divide Observatory in Colorado Springs, Colorado, in 1999 were used to build a light curve for this object. The asteroid displayed a rotation period of 7.40 ± 0.02 hours and a brightness variation of 0.25 ± 0.01 in magnitude.