Asteroid 173117, Promachus, a Jupiter Trojan, was discovered September 24, 1973 by C. J. van Houten and Ingrid van Houten-Groeneveld on Palomar Schmidt plates taken by Tom Gehrels. It has a period of 11 years, 256 days.
It was named for a Greek warrior in The Iliad who was killed by the Trojan hero Acamas.
From Book 14 of The Iliad:
"Then Acamas, as he bestrode his brother, smote with a thrust of his spear the Boeotian Promachus, who was seeking to drag the body from beneath him by the feet. And over him Acamas exulted in terrible wise, and cried aloud:Ye Argives, that rage with the bow, insatiate of threatenings, not for us alone, look you, shall there be toil and woe, but even in like manner shall ye too be slain. Mark how your Promachus sleepeth, vanquished by my spear, to the end that the blood- price of my brother be not long unpaid. Aye, and for this reason doth a man pray that a kinsman be left him in his halls, to be a warder off of ruin. So spake he, and upon the Argives came sorrow by reason of his exuIting, and beyond all did he stir the soul of wise-hearted Peneleos. He rushed upon Acamas, but Acamas abode not the onset of the prince Peneleos. Howbeit Peneleos thrust and smote Ilioneus, son of Phorbas, rich in herds, whom Hermes loved above all the Trojans and gave him wealth; and to him the mother bare Ilioneus, an only child. Him then did Peneleos smite beneath the brow at the roots of the eyes, and drave out the eyeball, and the shaft went clean through the eye and through the nape ot the neck, and he sank down stretching out both his hands. But Peneleos drawing his sharp sword let drive full upon his neck, and smote off to the the ground the head with the helmet, and still the mighty spear stood in the eye; and holding it on high like a poppy-head he shewed it to the Trojans, and spake a word exultingly:Tell, I pray you, ye Trojans, to the dear father and the mother of lordly Ilioneus to make wailing in their halls, for neither will the wife of Promachus, son of Alegenor, rejoice in the coming of her dear husband, when we youths of the Achdeans return with our ships from out of Troy-land."
Promachus, in Greek, means "leading in battle."
Astrologically, asteroid Promachus seems to mean "an eye for an eye," sense of victimhood and desire for vengeance, need to get past these.
The glyph for Promachus is mine.