This is because the transmural extent of the AAR is consistently high (mean, 94%±6%; range, 70%100%%) and independent of that of T2-hyperintensity, which is variable (bright-blood-T2: mean, 55%±26%; range, 0% 95%; black-blood-T2: mean, 53%±25%; range, 0% 96%).
The outdoor setting introduced new variables: bright sunlight, strong breezes, and surprisingly warm temperatures for December, causing laptops to overheat.
No bright variable star, or minor planet at location.
Detected with the Swift UVOT in five UVW1 filter exposures as bright variable source at position RA=00h42m24.14s, Dec=41d11'54.8" (J2000, position error 0.2").
AE Aurigae, a runaway star, is a bright variable star currently located within the Flaming Star Nebula.
The opposed locations of Orion and Scorpio, with their corresponding bright variable red stars Betelgeuse and Antares, were noted by ancient cultures around the world.
Lambda Pavonis is a bright irregular variable ranging between magnitudes 3.4 and 4.4; this variation can be observed with the unaided eye.
Slightly variable, it is the brightest rapidly oscillating Ap star in the night sky.
Because Betelgeuse is a variable star whose brightness ranges between 0.2 and 1.2, there are periods when it will surpass Procyon to become the seventh brightest star.
Other features announced in Hubble's paper were M31's population of bright, irregular, slowly varying variables.
