====== Ultra-compact X-ray binaries ======

VALUES LIKE [X] ARE “(BEST) GUESSES” AND THUS MAY BE COMPLETELY WRONG. VALUES LIKE X? ARE UNCERTAIN.

^Name                   ^Period      ^Pdot      ^d          ^m2,min     ^q          ^M1        ^i     ^Mv       ^V         ^RA         ^DEC        ^l     ^b    |
^                       ^[s]         ^[s/s]     ^[pc]       ^Msun       ^           ^Msun      ^[deg] ^         ^          ^[h:m:s]    ^[d:m:s]    ^[deg] ^[deg]|
|[[#4U 1820-30]]        |685(2)      |          |7600       |~0.06      |            |1.4?    |      |3.7      |18.8      |18:23:40.45|-30:21:40.1|2.79  |7.91 |
|[[#4U 0513-40]]        |1020(20)    |          |12100      |~0.04      |            |1.4?    |      |         |          |05:14:06.46|-40:02:38.222|244.51|-35.04|
|[[#2S 0918-549]]       |1043(6)     |          | 5000      |~0.04      |            |1.4?    |  ~10 |         |          |09:20:26.47|-55:12:24.5|275.85|-3.85|
|[[#4U 1543-624]]       |1092(6)     |          |[5000]     |~0.04      |            |1.4?    |      |         |          |15:47:54.29|-62:34:11.2|321.76|-6.34|
|[[#4U 1850-087]]       |1236        |          |8200       |~0.03      |            |1.4?    |      |5.1      | 21       |18:53:04.86|-08:42:20.4|25.36 |-4.32| 
|[[#M15 X-2]]           |1355        |          |10000      |~0.03      |            |1.4?    |      |         | 18.6 (U) |21:29:58.06|+12:10:02.6|65.01 |-27.31| 
|[[#XTE J1807-294]]     |2412        |          |8500       |~0.02      |            |1.4?    |      |         |          |           |           |  |  |
|[[#4U 1626-67]]        |2520        |          |5000       |~0.02      |            |1.4?    |      |         |          |           |           |  |  |
|[[#4U 1626-67]]        |2520        |          |5000       |~0.02      |            |1.4?    |      |         |          |           |           |  |  |


===== 4U 1820-30 =====

In globular cluster NGC 6624. Period from [[ADS>1987ApJ...312L..17S|Stella et al. 1987]]. [[ADS>1993A&A...279L..21V|Van der Klis et al. 1993]] find \dotP/P = -5.3(1.1)e-8 yr^-1. V and coordinates from Simbad.


===== 4U 0513-40 =====

In globular cluster NGC 1851, period from UV [[ADS>2009ApJ...699.1113Z|Zurek et al. 2009]]



===== 2S 0918-549 =====

Period and inclination from [[ADS>2010arXiv1006.3980Z|Zhong & Wang 2010]]

===== 4U 1543-624 =====

Period from [[ADS>2004ApJ...616L.139W|Wang & Chakrabarty 2004]]. Coordinates from Simbad.

===== 4U 1850-087 =====

Period from [[ADS>1996MNRAS.282L..37H|Homer et al. 1996]]. In globular cluster NGC 6712. V and coordinates from Simbad.

===== M15 X-2 =====

Position and bringtness from [[ADS>2001ApJ...561L.101W]], period from [[ADS>2005ApJ...634L.105D]]