If it were an alignment rod, would it be an artificial aid ?
Alignment rod not permitted to be used in this way.
Rule 4.3a
Allowed and Prohibited Uses of Equipment
A player may use equipment to help his or her play during a round, except that a player must not create a potential advantage by:
*Using equipment (other than a club or a ball) that artificially eliminates or reduces the need for a skill or judgment that is essential to the challenge of the game
(Edit) and further in 4.3a(6)
Not Allowed.
Using any type of golf training or swing aid (such as an alignment rod or a weighted headcover or “donut”) or a non-conforming club to make a practice swing or in any other way that creates a potential advantage by helping the player in preparing for or making a stroke (such as help with swing plane, grip, alignment, ball position or posture).