cul a . ▁It ▁is ▁a ▁challenge ▁to ▁view ▁with ▁the ▁n aked ▁eye , ▁having ▁an ▁apparent ▁visual ▁magnitude ▁of ▁ 6 . 3 3 . ▁The ▁system ▁is ▁moving ▁closer ▁to ▁the ▁Earth ▁with ▁a ▁hel i oc ent ric ▁radial ▁velocity ▁of ▁− 3 8   km / s . ▁ ▁This ▁is ▁a ▁single - lined ▁spect ro scop ic ▁binary ▁star ▁system ▁with ▁an ▁orb ital ▁period ▁of ▁ 6 9 . 3   days ▁and ▁an ▁ecc ent ric ity ▁of ▁ 0 . 1 6 . ▁The ▁visible ▁component ▁is ▁a ▁Be ▁star ▁with ▁a ▁stell ar ▁classification ▁of ▁B 4 – 5   III – IV e ▁that ▁appears ▁to ▁be ▁near ing ▁the ▁end ▁of ▁its ▁main ▁sequence ▁lifetime . ▁It ▁shows ▁a ▁rapid ▁rotation ▁rate ▁with ▁a ▁project ed ▁rot ational ▁velocity ▁of ▁ 3 0 0   km / s , ▁which ▁is ▁just ▁below ▁the ▁estimated ▁critical ▁velocity ▁of ▁ 3 6 7   km / s . ▁ ▁The ▁nature ▁of ▁the ▁companion ▁is ▁unknown , ▁but ▁based ▁upon ▁its ▁mass ▁it ▁may ▁be ▁a ▁K - ▁or ▁M - type ▁star . ▁However , ▁it ▁could ▁be ▁a ▁white ▁d war f ▁that ▁has ▁previously ▁under g one ▁a ▁mass ▁transfer ▁event ▁with ▁the ▁now ▁visible ▁component . ▁Because ▁of ▁the ▁lack ▁of ▁X - ray ▁emission ▁from ▁the ▁system , ▁a ▁third ▁possibility ▁is ▁that ▁the ▁companion ▁is ▁a ▁n aked ▁He ▁star ▁that ▁has ▁been ▁stri pped