the moon is the large mass that causes the tide to come in and out.
what large mass causes the tide to come in and out?
the moon
the mass ratio of the two components – called the "primary" and "secondary" of a binary system – is an important characteristic. most binary asteroids have a large mass ratio, i.e. a relatively small satellite in orbit around the main component. systems with a small minor-planet moon – also called "companion" or simply "satellite" – include 87 sylvia, 107 camilla, 45 eugenia, 121 hermione, 130 elektra, 22 kalliope, 283 emma, 379 huenna and 243 ida (in order of decreasing primary size). some binary systems have a mass ratio near unity, i.e., two components of similar mass. they include 90 antiope, , and 69230 hermes, with average component diameters of 86, 1.8, 0.9 and 0.8 km, respectively.
binary asteroid
in 1955, the club was rocked by the sudden death of manager mccandless, days after the players had returned to pre-season training. the swansea board decided against appointing a permanent replacement, instead establishing a three-man selection committee consisting of ron burgess, allchurch and joe sykes, with burgess being given the title of "team manager". under the guidance of the trio, the swans were able to mount a serious promotion challenge, going unbeaten in eleven games between september and december 1955. however, following a serious injury to defender tom kiley, the committee fell out with the swansea board over their refusal to provide funds to secure a replacement for kiley, burgess having transfers for bob mckinlay and jim dugdale rejected by the board. the loss of kiley and the conflict with the board saw swansea lose 7 of their last 8 matches of the season, eventually finishing in 10th position. his growing frustration at the club's refusal to invest in the squad and a strained relationship with new manager trevor morris led allchurch to announce his decision to leave the club, stating in his own newspaper column "i am ready to admit that i had high hopes that my own club would get promotion a couple of years ago [...] then i would have been happy to end my career in the town [...] but that dream does not look like coming true". morris later used the money from allchurch's transfer to sign colin webster and reg davies.
ivor allchurch