eta Ori › Forums › General Discussion › Orion’s Arrow › eta Ori 31 December 2019 at 1:29 pm #581840 Gary PoynerParticipant eta Ori is also a pulsating non supergiant star of the BCEP sub group. Amplitude is quite small though; 0.01 to 0.3, so at it’s extreme upper limit, I guess it could be noticed visually . Gary
