The obsolete constellation Robur Carolinum, The Oak of Charles Ⅱ, is a southern constellation bordering Carina, Vela, Centaurus, Musca, Chamaeleon and Volans. It was introduced by Edmond Halley in 1679, and its stars now belong to Carina. Robur Carolinum spans 33 degrees of the zodiac in the Signs of Libra and Scorpio

Abbreviation: Rob
Genitive: Roboris Caroli ^[1]

Robur Carolinum Constellation Stars

2000	2050	Star	Name	Sp. Class	Mag.	Orb
16♎12	16♎53	p Car		B4	3.30	1°00′
17♎34	18♎16	r Car		K3	4.45	1°30′
17♎51	18♎32	s Car		F2	3.81	1°00′
20♎04	20♎49	q Car		K3	3.39	1°00′
22♎19	23♎01	η Car	Foramen	p	4.47	1°10′
22♎26	23♎08	u Car		K0	3.78
22♎53	23♎35	υ Car	Vathorz Prior	A9	2.92
23♎11	23♎52	w Car		K3	4.58
25♎07	25♎49	x Car		G0	3.93
27♎03	27♎45	y Car		A6	4.59
29♎11	29♎53	θ Car	Vathorz Posterior	B0	2.74
29♎27	00♏09	z Car		G8	4.62
01♏58	02♏39	β Car	Miaplacidus	A1	1.67
04♏14	04♏55	E Car		B2	4.67
07♏26	08♏07	ω Car	Simiram	B8	3.29
11♏19	12♏00	G Car		F6	4.47
13♏23	14♏04	K Car		A2	4.72
18♏05	18♏46	I Car		F2	3.99

Robur Carolinum Astrology

Robson

ROBUR CAROLINUM. Charles’s Oak.

History. Formed by Halley, 1679, in commemoration of the oak in which Charles II lay hidden on 3rd September, 1651.

Influence. It is said to give a frank, honorable, generous, hospitable and steady nature. ^[2]

Allen

Robur Carolinum, Charles’ Oak, was formally published by Halley in 1679 in commemoration of the Royal Oak of his patron, Charles II, in which the king had lain hidden for twenty-four hours after his defeat by Cromwell in the battle of Worcester, on the 3d of September, 1651. This invention secured for Halley his master’s degree from Oxford, in 1678, by the king’s express command. But La Caille complained that the construction of the figure, from some of the finest stars in Ship, ruined that already incomplete constellation, “and the Oak ceases to flourish after half a century of possession,” although Bode sought to restore it, and Burritt incorporated it into his maps, assigning to it twenty-five stars. Halley’s 2d‑magnitude α Roboris was changed to β Argūs, now in Carina.

Reeve’s list of Chinese star-titles has only one entry under Robur —

Nan Chuen, the Southern Ship, θ, etc., but doubtful, incorrectly laid down. ^[3]

References

1. SkyEye: Robur Carolinum
2. Fixed Stars and Constellations in Astrology, Vivian E. Robson, 1923, p.59.
3. Star Names: Their Lore and Meaning, Richard H. Allen, 1889, p.349.