Eclipsing binary in the constellation of Leo Minor
AS Leonis Minoris
A light curve for AS Leonis Minoris. The main plot shows the full light curve, and the inset shows the time around minimum brightness at an expanded scale. Adapted from Lipunov et al. (2016)[1]
AS LMi, TYC 2505-672-1, MASTER OT J095310.04+335352.8, IRAS F09501+3408, 2MASS J09531000+3353527
Database references
SIMBAD
data
AS Leonis Minoris (AS LMi), also known as TYC 2505-672-1, is an eclipsing binary system in the constellation of Leo Minor. It has by far the longest period, 69.1 years, of any known eclipsing binary.[1] During its roughly 3.45 year long eclipses, it fades by 4.5 magnitudes (about a factor of 60).[4]
AS LMi's variability was first detected in 2013, during a search for "disappearing stars" in the MASTER database. It was initially thought to be an R Coronae Borealis variable star, although its fading was unusually slow for an R Coronae Borealis variable.[5] Because R Coronae Borealis variables fade repeatedly, the discovery of the star's dramatic brightness decline triggered a search of archival photographic plates for evidence of earlier dimming events.[6][7] Tang et al. used DASCH to search the large collection of Harvard photographic plates, and found that the star had dimmed for three years during the 1940s. They recognized that AS LMi is a very long period eclipsing binary, similar to the ε Aurigae system.[8]
The binary system consists of an M-giant primary star orbited by a small hot secondary star that is itself surrounded by an optically thick (large optical depth) disk.[4]
^ abCite error: The named reference Lipunov was invoked but never defined (see the help page).
^ abcdefCite error: The named reference dr2 was invoked but never defined (see the help page).
^ abCite error: The named reference ivsi was invoked but never defined (see the help page).
^ abCite error: The named reference Rodriguez was invoked but never defined (see the help page).
^Cite error: The named reference AT4784 was invoked but never defined (see the help page).
^Cite error: The named reference AT4787 was invoked but never defined (see the help page).
^Cite error: The named reference AT4788 was invoked but never defined (see the help page).
^Cite error: The named reference Tang was invoked but never defined (see the help page).
ASLeonisMinoris (AS LMi), also known as TYC 2505-672-1, is an eclipsing binary system in the constellation of Leo Minor. It has by far the longest period...
YZ LeonisMinoris, also known as SDSS J0926+3624, is a star system in the constellation Leo Minor. It is an AM Canum Venaticorum-type variable star, a...
magnitude 4.5. 46 LeonisMinoris, an orange giant of magnitude 3.8, is located some 95 light-years from Earth. At magnitude 4.4, Beta LeonisMinoris is the second-brightest...
42 LeonisMinoris (42 LMi) is a solitary, bluish-white hued star located in the northern constellation Leo Minor. It has a visual apparent magnitude of...
32 LeonisMinoris (32 LMi), also known as HD 90840, is a solitary star located in the northern constellation Leo Minor. It is faintly visible to the naked...
RZ LeonisMinoris is a cataclysmic variable star system in the northern constellation of Leo Minor. It undergoes frequent outbursts that vary in brightness...
20 LeonisMinoris is a binary star system in the northern constellation of Leo Minor. It is faintly visible to the naked eye, having an apparent visual...
46 LeonisMinoris (abbreviated 46 LMi), also named Praecipua /prɪˈsɪpjʊə/, is the brightest star in the constellation of Leo Minor. It is of spectral class...
7 LeonisMinoris (7 LMi) is a star located in the northern constellation Leo Minor. It is also designated as HD 82087 and HR 3764. 7 LMi is faintly visible...
15 LeonisMinoris is the Flamsteed designation for a single star in the northern circumpolar constellation of Ursa Major. It has an apparent visual magnitude...
34 LeonisMinoris (34 LMi), also known as HD 91365 or 11 H. LeonisMinoris is a solitary star located in the northern constellation Leo Minor. It is faintly...
11 LeonisMinoris is a binary star located 36.5 light years away from Earth, in the northern constellation of Leo Minor. It is visible to the naked eye...
SX LeonisMinoris is a dwarf nova of the SU Ursae Majoris type that was first discovered as a 16th magnitude blue star in 1957, before its identity was...
21 LeonisMinoris is a star in the constellation of Leo Minor. With an apparent magnitude of about 4.5, the star is faintly visible to the naked eye (see...
VW Leo Minoris is a tight quadruple star system, located in the constellation of Leo Minor. With a peak combined apparent visual magnitude of 8.07, it...
8 LeonisMinoris (8 LMi) is a solitary, red hued star located in the northern constellation Leo Minor. It has an apparent magnitude 5.37, making it faintly...
R LeonisMinoris (R LMi) is a Mira variable type star in the constellation Leo Minor. It ranges between apparent magnitude 6.3 and 13.2, and spectral types...
28 LeonisMinoris (28 LMi) is a solitary, orange hued star located in the northern constellation Leo Minor, the lesser lion. It has an apparent magnitude...
19 LeonisMinoris (19 LMi) is a spectroscopic binary located in the northern constellation Leo Minor. It has an apparent magnitude of 5.1, making it one...
variable star designation SU LeonisMinoris; 10 LeonisMinoris is the Flamsteed designation. This body is visible to the naked eye as a faint, orange-hued star...
38 LeonisMinoris is a binary star system in the northern constellation of Leo Minor. It shines with a combined light of apparent magnitude 5.84, which...
23 LeonisMinoris (23 LMi) is a solitary, bluish-white hued star located in the northern constellation Leo Minor. It is positioned 7° south and 11" west...
40 LeonisMinoris (40 LMi) is a white hued star located in the northern constellation Leo Minor. It is rarely called 14 H. LeonisMinoris, which is the...
37 LeonisMinoris is a single, yellow-hued star in the northern constellation of Leo Minor. It is faintly visible to the naked eye with an apparent visual...
listed as TON 1, the first entry of the Tonantzintla Catalogue. SX LeonisMinoris – variable star listed as TON 45. U Geminorum – star system listed as TON...
30 LeonisMinoris is a single star in the northern constellation of Leo Minor. It is visible to the naked eye as a faint, white-hued point of light with...
41 LeonisMinoris is a single star in the northern constellation Leo Minor, located near the southern border with the neighboring constellation of Leo...
Global Information