15396-3152 B 1302 (HD 139501)

15^h 39^m 37.27^s -31° 52' 15.4" P.A. 264.00 sep 2.1 mag 9.72,10.21 Sp F6V

Coord 2000	15396-3152	Discov num	B 1302	Comp		Coord arcsec 2000	15 39 37.27 -31 52 15.4
Date first	1928	Date last	1991	Obs	6
Pa first	262	Pa last	264.3	P.A. Now (θ)	264.3°
Sep first	2.2	Sep last	2.101	Sep. Now (ρ)	2.101"
Mag pri	9.72	Mag sec	10.21	delta mag (ΔM)	0.49	Spectral class	F6V (yellow-white)
Pri motion ra	-002	Sec motion ra	-002
Pri motion dec	-013	Sec motion dec	-013
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 139501		Constellation	Lupus		SAO	206841		Tycho2	7327-00896-1
Gaia DR2	6016215159732618112		HD	139501

WDS 15396-3152 B 1302 (HD 139501) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
B__1921a	orb -	van den Bos, W.H.	1921MNRAS..81..474V
B__1921a		MNRAS 81, 474, 1921
B__1921b	orb -	van den Bos, W.H.	.
B__1921b		Proc. Amsterdam Acad. 30, 72, 1921
B__1923a	Po j	van den Bos, W.H.	1923BAN.....1..193V
B__1923a		BAN 1, 193, 1923
B__1923b	orb -	van den Bos, W.H.	1923BAN.....2...25V
B__1923b		BAN 2, 25, 1923
B__1923c	orb -	van den Bos, W.H.	1923BAN.....2...29V
B__1923c		BAN 2, 29, 1923
B__1925a	Ma j	van den Bos, W.H.	1925AnLei..143...1V
B__1925a		Ann. Leiden Obs. 14, Pt.3, 1925
B__1925b	Ma j	van den Bos, W.H.	1925BAN.....2..197V
B__1925b	+Po	BAN 2, 197, 1925
B__1926a	orb -	van den Bos, W.H.	1926BAN.....3..127V
B__1926a		BAN 3, 127, 1926
B__1926b	orb -	van den Bos, W.H.	1926BAN.....3..128V
B__1926b		BAN 3, 128, 1926
B__1927a	orb -	van den Bos, W.H.	1927BAN.....3..261V
B__1927a		BAN 3, 261, 1927
B__1927b	-	van den Bos, W.H.	1927BAN.....4...45V
B__1927b		BAN 4, 45, 1927
B__1927b		(4th list of new southern double stars; precise measures in later references)
B__1927c	Ma -	van den Bos, W.H.	1927BAN.....4..109V
B__1927c		BAN 4, 109, 1927
B__1927c		(5th list of new southern double stars; precise measures in later references)
B__1927D	Ma -	van den Bos, W.H.	1927sdsc.book......
B__1927D		cited in SDS (Southern Double Star Cat.), 1927
B__1928a	Ma -	van den Bos, W.H.	1928BAN.....4..235V
B__1928a		BAN 4, 235, 1928
B__1928a		(6th list of new southern double stars; precise measures in later references)
B__1928b	Ma j	van den Bos, W.H.	1928AnLei..144...1V
B__1928b		Ann. Leiden Obs. 14, Pt.4, 1928
B__1928c	Ma -	van den Bos, W.H.	1928MNRAS..88..488F
B__1928c		MNRAS 88, 488, 1928
B__1928d	Ma j	van den Bos, W.H.	1928CiUO...78...13V
B__1928d		Union Obs. Johannesburg Circ. 78, 13, 1928
B__1928e	orb -	van den Bos, W.H.	.
B__1928e		Mem. Copenhagen Acad. 12, 2, 1928
B__1929a	Ma j	van den Bos, W.H.	1929CiUO...80...59V
B__1929a		Union Obs. Johannesburg Circ. 80, 59, 1929
B__1929b	orb -	van den Bos, W.H.	1929CiUO...79...49V
B__1929b		Union Obs. Johannesburg Circ. 79, 49, 1929
B__1929c	Ma -	van den Bos, W.H.	1929BAN.....5..125V
B__1929c		BAN 5, 125, 1929
B__1930a	Ma j	van den Bos, W.H.	1930CiUO...83..135V
B__1930a		Union Obs. Johannesburg Circ. 83, 135, 1930
B__1930b	Ma -	van den Bos, W.H.	1930BAN.....5..179V
B__1930b		BAN 5, 179, 1930
B__1930c	Ma -	van den Bos, W.H.	1930BAN.....5..183V
B__1930c		BAN 5, 183, 1930
B__1931a	Ma -	van den Bos, W.H.	1931MNRAS..92...19F
B__1931a		MNRAS 92, 19, 1931
B__1931b	Ma -	van den Bos, W.H.	1931CiUO...85..183V
B__1931b		Union Obs. Johannesburg Circ. 85, 183, 1931
B__1932a	Ma j	van den Bos, W.H.	1932CiUO...87..273V
B__1932a		Union Obs. Johannesburg Circ. 87, 273, 1932
B__1932b	Ma j	van den Bos, W.H.	1932CiUO...88..324V
B__1932b		Union Obs. Johannesburg Circ. 88, 324, 1932
B__1932C	Ma -	van den Bos, W.H.	1932QB821.A43......
B__1932C		cited in ADS (Aitken Double Star Cat.), 1932
B__1933a	Ma -	van den Bos, W.H.	1933BAN.....7....1V
B__1933a		BAN 7, 1, 1933
B__1933b	J -	van den Bos, W.H.	1933CiUO...90..379V
B__1933b		Union Obs. Johannesburg Circ. 90, 379, 1933
B__1933c	orb -	van den Bos, W.H.	1933CiUO...90..388V
B__1933c		Union Obs. Johannesburg Circ. 90, 388, 1933
B__1933d	Ma j	van den Bos, W.H.	1933CiUO...90..401V
B__1933d		Union Obs. Johannesburg Circ. 90, 401, 1933
B__1934a	Ma -	van den Bos, W.H.	1934CiUO...92...61V
B__1934a		Union Obs. Johannesburg Circ. 92, 61, 1934
B__1934b	orb -	van den Bos, W.H.	1934CiUO...92..102V
B__1934b		Union Obs. Johannesburg Circ. 92, 102, 1934
B__1935a	Ma j	van den Bos, W.H.	1935CiUO...94..134V
B__1935a	+J	Union Obs. Johannesburg Circ. 93, 134, 1935
B__1935b	orb -	van den Bos, W.H.	1935CiUO...94..148V
B__1935b		Union Obs. Johannesburg Circ. 94, 148, 1935
B__1935c	Ma j	van den Bos, W.H.	1935CiUO...94..149V
B__1935c		Union Obs. Johannesburg Circ. 94, 149, 1935
B__1935D	orb -	van den Bos, W.H.	1935QB821.A3.......
B__1935D		letter cited by Aitken, The Binary Stars, 1935
B__1936a	orb -	van den Bos, W.H.	1936CiUO...96..231V
B__1936a		Union Obs. Johannesburg Circ. 96, 231, 1936
B__1936b	Ma j	van den Bos, W.H.	1936CiUO...96..234V
B__1936b		Union Obs. Johannesburg Circ. 96, 234, 1936
B__1937a	orb -	van den Bos, W.H.	1937CiUO...98..341V
B__1937a		Union Obs. Johannesburg Circ. 98, 341, 1937
B__1937b	Ma -	van den Bos, W.H.	1937CiUO...98..362V
B__1937b		Union Obs. Johannesburg Circ. 98, 362, 1937
B__1938a	orb -	van den Bos, W.H.	1938CiUO...99..445V
B__1938a		Union Obs. Johannesburg Circ. 99, 445, 1938
B__1938d	orb -	van den Bos, W.H.	1938CiUO..100..480V
B__1938d		Union Obs. Johannesburg Circ. 100, 480, 1938
B__1938e	Ma j	van den Bos, W.H.	1938CiUO..100..481V
B__1938e		Union Obs. Johannesburg Circ. 100, 481, 1938
B__1940	orb -	van den Bos, W.H.	1940CiUO..102...49V
B__1940		Union Obs. Johannesburg Circ. 102, 49, 1940
B__1943A	Ma -	van den Bos, W.H.	1943AJ.....50..139A
B__1943A		cited by Alden (1943 AJ 50, 139)
B__1941	orb -	van den Bos, W.H.	1941CiUO..104...73V
B__1941		Union Obs. Johannesburg Circ. 104, 73, 1941
B__1945	orb -	van den Bos, W.H.	1945AJ.....51..198V
B__1945		AJ 51, 198, 1945
B__1947	Ma -	van den Bos, W.H.	1947CiUO..105..134V
B__1947		Union Obs. Johannesburg Circ. 105, 134, 1947
B__1947b	Po j	van den Bos, W.H. (in Voute et al.)	1947AnBos...6....3V
B__1947b		Ann. Bosscha Obs. Lembang 6, Pt.3, C1, 1947
B__1948	Ma -	van den Bos, W.H.	1948CiUO..107..259V
B__1948		Union Obs. Johannesburg Circ. 107, 259, 1948
B__1949a	orb -	van den Bos, W.H.	1949CiUO..108..310V
B__1949a		Union Obs. Johannesburg Circ. 108, 310, 1949
B__1949b	orb -	van den Bos, W.H.	1949CiUO..108..311V
B__1949b		Union Obs. Johannesburg Circ. 108, 311, 1949
B__1949c	Ma j	van den Bos, W.H.	1949CiUO..108..312V
B__1949c		Union Obs. Johannesburg Circ. 108, 312, 1949
B__1950a	orb -	van den Bos, W.H.	1950CiUO..109..366V
B__1950a		Union Obs. Johannesburg Circ. 109, 366, 1950
B__1950b	orb -	van den Bos, W.H.	1950CiUO..109..370V
B__1950b		Union Obs. Johannesburg Circ. 109, 370, 1950
B__1950c	Ma -	van den Bos, W.H.	1950CiUO..109..371V
B__1950c		Union Obs. Johannesburg Circ. 109, 371, 1950
B__1951a	Ma j	van den Bos, W.H.	1951CiUO..111...13V
B__1951a	+J	Union Obs. Johannesburg Circ. 111, 13, 1951
B__1951b	orb -	van den Bos, W.H.	1951CiUO..111...11V
B__1951b		Union Obs. Johannesburg Circ. 111, 11, 1951
B__1951c	orb -	van den Bos, W.H.	1951CiUO..112..143V
B__1951c		Union Obs. Johannesburg Circ. 112, 143, 1951
B__1951d	-	van den Bos, W.H.	1951JO.....34...85V
B__1951d		J. Obs. 34, 85, 1951
B__1953a	Ma -	van den Bos, W.H.	1953CiUO..113..185V
B__1953a		Union Obs. Johannesburg Circ. 113, 185, 1953
B__1953b	orb -	van den Bos, W.H.	1953CiUO..113..209V
B__1953b		Union Obs. Johannesburg Circ. 113, 209-219, 1953	1953MNSSA..12...19V
B__1953b		(also MNASSA 12, 19, 1953; MNASSA 12, 57, 1953)	1953MNSSA..12...57V
B__1954	orb -	van den Bos, W.H.	1954CiUO..114..235V
B__1954		Union Obs. Johannesburg Circ. 114, 235, 1954
B__1956a	Ma -	van den Bos, W.H.	1956CiUO..115..266V
B__1956a	+J	Union Obs. Johannesburg Circ. 115, 266, 1956
B__1956b	orb -	van den Bos, W.H.	1956CiUO..115..279V
B__1956b		Union Obs. Johannesburg Circ. 115, 279-284, 1956
B__1956c	orb -	van den Bos, W.H.	1956MNSSA..15...39V
B__1956c		MNASSA 15, 39, 1956
B__1957a	orb -	van den Bos, W.H.	1957CiUO..116..289V
B__1957a		Union Obs. Johannesburg Circ. 116, 289-291, 1957
B__1957b	Ma -	van den Bos, W.H.	1957CiUO..116..291V
B__1957b		Union Obs. Johannesburg Circ. 116, 291, 1957
B__1958	Ma -	van den Bos, W.H.	1958AJ.....63...63V
B__1958		AJ 63, 63, 1958
B__1959a	Mb j	van den Bos, W.H.	1959ApJS....4...45V
B__1959a		ApJS 4, 45, 1959
B__1959b	orb -	van den Bos, W.H.	1959JO.....42...79V
B__1959b		J. Obs. 42, 79, 1959
B__1959c	orb -	van den Bos, W.H.	1959JO.....42...93V
B__1959c		J. Obs. 42, 93, 1959
B__1959d	Ma -	van den Bos, W.H.	1959CiUO..118..308V
B__1959d		Union Obs. Johannesburg Circ. 118, 308, 1959
B__1959e	orb -	van den Bos, W.H.	1959CiUO..118..311V
B__1959e		Union Obs. Johannesburg Circ. 118, 311-312, 1959
B__1960a	Ma -	van den Bos, W.H.	1960CiUO..119..321V
B__1960a		Union Obs. Johannesburg Circ. 119, 321, 1960
B__1960b	Ma j	van den Bos, W.H.	1960PYerO...9....1B
B__1960b	+Mb	Pub. Yerkes Obs. 9, pt. 1, 1960
B__1960c	orb -	van den Bos, W.H.	1960JO.....43..145V
B__1960c		J. Obs. 43, 145, 1960
B__1960d	orb -	van den Bos, W.H.	1960JO.....43..152V
B__1960d		J. Obs. 43, 152, 1960
B__1960e	orb -	van den Bos, W.H.	1960CiUO..119..359V
B__1960e		Union Obs. Johannesburg Circ. 119, 339-340, 1960
B__1960f	orb -	van den Bos, W.H.	1960CiUO..119..341V
B__1960f		Union Obs. Johannesburg Circ. 119, 341-343, 1960
B__1961a	Ma -	van den Bos, W.H.	1961CiUO..120..353V
B__1961a		Union Obs. Johannesburg Circ. 120, 353, 1961
B__1961b	orb -	van den Bos, W.H.	1961CiUO..120..374V
B__1961b		Union Obs. Johannesburg Circ. 120, 374-375, 1961
B__1961c	orb -	van den Bos, W.H.	1961CiUO..120..377V
B__1961c		Union Obs. Johannesburg Circ. 120, 377-379, 1961
B__1961d	orb -	van den Bos, W.H.	1961CiUO..120..380V
B__1961d		Union Obs. Johannesburg Circ. 120, 380-381, 1961
B__1961e	orb -	van den Bos, W.H.	1961PASP...74..201V
B__1961e		PASP 74, 201, 1961
B__1962a	Ma -	van den Bos, W.H.	1962AJ.....67..141V
B__1962a		AJ 67, 141, 1962
B__1962b	orb -	van den Bos, W.H.	1962AJ.....67..552V
B__1962b		AJ 67, 552, 1962
B__1962c	orb -	van den Bos, W.H.	1962JO.....45...55V
B__1962c		J. Obs. 45, 55, 1962
B__1962d	Ma j	van den Bos, W.H.	1962AJ.....67..555V
B__1962d		AJ 67, 555, 1962
B__1963a	Ma -	van den Bos, W.H.	1963AJ.....68...57V
B__1963a		AJ 68, 57, 1963
B__1963b	Ma j	van den Bos, W.H.	1963AJ.....68..582V
B__1963b		AJ 68, 582, 1963
B__1964a	orb -	van den Bos, W.H.	1964ROCi..123...62V
B__1964a		Republic Obs. Circ. 123, 62, 1964
B__1964b	orb -	van den Bos, W.H.	1964JO.....47...34V
B__1964b		J. Obs. 47, 34, 1964
B__1965a	Ma -	van den Bos, W.H.	1965ROCi..124...70V
B__1965a		Republic Obs. Circ. 124, 70, 1965
B__1965b	orb -	van den Bos, W.H.	1965ROCi..124...86V
B__1965b		Republic Obs. Circ. 124, 86, 1965
B__1966a	Ma -	van den Bos, W.H.	1966ROCi..125...93V
B__1966a		Republic Obs. Circ. 125, 93, 1966
B__1966b	orb -	van den Bos, W.H.	1966ROCi..125..112V
B__1966b		Republic Obs. Circ. 125, 112, 1966
B__1966c	orb -	van den Bos, W.H.	1966ROCi..125..118V
B__1966c		Republic Obs. Circ. 125, 118, 1966
B__1966d	orb -	van den Bos, W.H.	1966ROCi..125..119V
B__1966d		Republic Obs. Circ. 125, 119-120, 1966
B__1967	Ma -	van den Bos, W.H.	1967ROCi..126..127V
B__1967		Republic Obs. Circ. 126, 127, 1967
B__1967b	orb -	van den Bos, W.H.	1967JO.....13..119V
B__1967b		J. Obs. 13, 119, 1967
B__1968	Ma -	van den Bos, W.H.	1968ROCi..127..157V
B__1968		Republic Obs. Circ. 127, 157, 1968
B__9999	Ma -	van den Bos, W.H.	...................
B__9999		Unpublished, manuscript or reference not found.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
15396-3152	B 1302		1991	6	264	2.1	9.72	10.21	F6V		153937.27-315215.4

If you need more information about this double, apply for a data request form to the WDS.

WDS 15396-3152 B 1302 (HD 139501) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 15396-3152 B 1302 (HD 139501) : MEASURES

No records found.

WDS 15396-3152 (HD 139501) : VIRTUAL EYEPIECE

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

WDS 15396-3152 (HD 139501) : ALADIN DSS IMAGE @ 15^h 39^m 37.27^s -31° 52' 15.4"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 15396-3152 B 1302 (HD 139501) : NEIGHBORHOODS

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		15396-3152	B 1302		264	2.1
Show		15417-3151	SEE 244		48	1.1	28
Show		15400-3123	I 244		24	1.1	30
Show		15403-3223	BRR 11		62	1.0	33
Show		15371-3153	RST1851	AB	202	3.2	33
Show		15408-3121	KOH 45		75	6.0	35
Show		15375-3132	I 242		39	2.0	35
Show		15370-3137	RST1850	AB	281	4.8	37
Show		15370-3137	RST1850	BC	135	1.4	37
Show		15389-3117	KOH 43	AB	240	0.7	37
Show		15389-3117	KOH 43	AB,C	192	4.5	37
Show		15379-3115	I 243		325	1.0	44
Show		15375-3229	RSS 381	AB	234	9.8	46
Show		15375-3229	JNN 207	AC	132	3.2	46
Show		15375-3229	JNN 207	AD	280	4.6	46
Show		15375-3229	SKF2044	AE	44	5.4	46
Show		15382-3059	HJ 2787		135	15.3	57
Show		15408-3252	SHY 278		264	999.9	62
Show		15370-3249	RSS 380		162	10.4	66
Show		15366-3246	KOH 42		135	2.4	67
Show		15416-3051	KPP 351		45	3.5	67
Show		15420-3043	HJ 2789	AB	303	29.3	76
Show		15420-3043	DAW 211	BC	94	7.2	76
Show		15460-3142	BRT3024		108	3.9	81
Show		15347-3055	LDS4560		27	11.5	86
Show		15362-3306	FIN 231		304	0.2	86
Show		15332-3122	PRO 122		36	4.6	88
Show		15327-3143	BRT3308		116	2.2	88
Show		15363-3035	B 294		209	1.9	89
Show		15426-3030	WFC 166		24	9.5	91
Show		15439-3306	KOH 46	AB	185	2.8	92
Show		15323-3157	BRT3020		122	3.6	94
Show		15441-3311	BRR 12	AB	200	1.4	97
Show		15441-3311	KOH 47	AB,C	76	4.0	97
Show		15396-3011	BVD 116		171	16.1	102
Show		15477-3210	B 1306		246	0.5	104
Show		15476-3127	YMG 76		149	0.1	106
Show		15473-3237	COO 272		56	10.7	107
Show		15419-3009	ARG 28	AB	24	35.0	108
Show		15419-3009	ARG 28	AC	332	35.8	108
Show		15419-3009	ARG 28	AD	324	88.6	108
Show		15462-3300	UC 3060		77	44.9	108
Show		15398-3001	BRT3023		131	3.3	112
Show		15480-3121	RST1864		340	0.7	113
Show		15317-3103	SKF2042		151	73.7	113
Show		15382-2958	DAW 144		302	1.5	116
Show		15441-3009	LDS5844		263	445.0	117
Show		15396-2954	KOH 44		249	0.2	119
Show		15304-3218	B 1294		22	1.6	120
Show		15458-3021	BRR 13		349	0.7	121
Show		15358-2959	KOH 41		256	0.9	124

WDS 15396-3152 : COMPONENTS

	A
B	pa=263.3° sep=1.79"

15396-3152 A

Componente originario normalizzato	AB	Name	HD 139501	Coord arcsec 2000	153937.27-315215.4	Mag	9.72
Spectral class	F6V (yellow-white)	PmRA	-2.00	PmDE	-13.0	SAO	206841
Tycho2	7327-00896-1	HD	139501	DM	CD-3112150

Tycho2

Tycho2	7327-00896-1	Pflag	P	RAmdeg	234.90529267	DEmdeg	-31.87095630
PmRA	-1.5	PmDE	-12.6	E RAmdeg	14	E DEmdeg	18
E pmRA	2.5	E pmDE	2.5	EpRAm	1991.18	EpDEm	1990.65
Num	6	Q RAmdeg	2.1	Q DEmdeg	0.7	Q pmRA	2.2
Q pmDE	0.7	BTmag	10.224	E BTmag	0.029	VTmag	9.715
E VTmag	0.026	Prox	21	TYC	T	HIP
CCDM		RAdeg	234.90551694	DEdeg	-31.87090778	EpRA 1990	1.72
EpDE 1990	1.53	E RAdeg	14.2	E DEdeg	18.2	Posflg	D
Corr	0.1

SAO

SAO	206841	DelFlag		RA1950		PmRA1950	-0.0031
DE1950		PmDE1950	0.001	Vmag	9.2	SpType	F8
Double code		Source	40	CatNum	8090	DM	CD-3112150
DMcomp		BDsup		HD	139501	M HD	0
GC		RA1950rad	4.08623221	DE1950rad	-0.55342603	PmRA2000	-0.0032
PmDE2000	0.004

CCDM

Ccdm	15396-3152	RComp		Comp	A	Note1
Note2		Discov num		DRAs	1.06	DDEs	-14.1
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	9.8	Sp	F8	PmNote	*
PmRA	-40	PmDE	1	Dm number	-3112150	Cat1	CD
Name2	206841	Cat2	SAO	HD	139501	M HD
ADS BDS		M ADS BDS		N IDS		IDS	15334S3133A
HIC

15396-3152 B

Componente originario normalizzato	AB		Coord arcsec 2000	153937.13-315215.6		Mag	10.21		PmRA	-2.00
PmDE	-13.0		Tycho2	7327-00896-2		Calc delta mag	0.49		Calc coord	yes

Tycho2

Tycho2	7327-00896-2	Pflag	P	RAmdeg	234.90529267	DEmdeg	-31.87095630
PmRA	-1.5	PmDE	-12.6	E RAmdeg	14	E DEmdeg	18
E pmRA	2.5	E pmDE	2.5	EpRAm	1991.18	EpDEm	1990.65
Num	6	Q RAmdeg	2.1	Q DEmdeg	0.7	Q pmRA	2.2
Q pmDE	0.7	BTmag	10.700	E BTmag	0.041	VTmag	10.213
E VTmag	0.039	Prox	21	TYC	T	HIP
CCDM		RAdeg	234.90483333	DEdeg	-31.87096611	EpRA 1990	1.72
EpDE 1990	1.53	E RAdeg	21.3	E DEdeg	27.5	Posflg	D
Corr	0.1

CCDM

Ccdm	15396-3152	RComp		Comp	B	Note1
Note2		Discov num	B 1302	DRAs		DDEs
R dRAs		Year	1928	Theta	262	Rho	2.1
Obs	4	Vmag	10.2	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS		M ADS BDS		N IDS		IDS	15334S3133B
HIC