19525+0100 EVS 2 AB (Eta Aql)

19^h 52^m 28.36^s +01° 00' 20.4" P.A. 93.00 sep 0.7 mag 3.80,10.00 Sp F6Iab+F3V dist. 423.73 pc (1382.21 l.y.)

Coord 2000	19525+0100	Discov num	EVS 2	Comp	AB	Coord arcsec 2000	19 52 28.36 +01 00 20.4
Date first	2011	Date last	2012	Obs	2
Pa first	96	Pa last	92.8	P.A. Now (θ)	92.8°
Sep first	0.7	Sep last	0.655	Sep. Now (ρ)	0.655"
Mag pri	3.80	Mag sec	10.00	delta mag (ΔM)	6.2	Spectral class	F6Iab+F3V (yellow-white/yellow-white)
Pri motion ra	+009	Sec motion ra
Pri motion dec	-008	Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

19525+0100 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Eta Aql	125159	19 52 28 +01 00 20	EVS 2 AB	2012	2	93	0.7	3.80	10.00	6.20		<===
Show		125159	19 52 28 +01 00 20	KRV 27 AC	2015	2	92	135.8	3.80	20.50	16.70

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	Eta Aql	Constellation	Aquila	SAO	125159	HIP	97804
Tycho2	0480-03027-1	HD	187929	HR	7570	GC	27517
BD	BD+00 4337	Bayer	Eta Aquilae	Bayer name	Eta Aql	Flamsteed	55 Aquilae
Flamsteed name	55 Aql	FK5	746	Distance	423.73	Distance ly	1382.21
Bayer greek	η Aql

WDS 19525+0100 EVS 2 AB (Eta Aql) : NOTES

discov_num	notes	refcode
EVS 2	1975.402: oblate correlation peak	Bla1977a
	Primary is Cepheid eta Aql.
	Masses are 5.7 and 2.3 Msun. Estimated period = 866y,
	a = 200au = 0.73".	Evs2013
	NPOI Limb-darkened diameter 1.73 +/- 0.05 mas,	NOI1999
	R = 66. +/- 22. \rsun.
	NPOI Limb-darkened diameter 1.69 +/- 0.04 mas.	NOI2001a
	NPOI Limb-darkened diameter 1.804 +/- 0.007 mas, Sp = G0III,	NOI2018
	Teff = 6329 +/-126 K, M = 4.24 +/- 0.58 \msun, Age = 0.15 +/- 0.05 Gyr.

REFERENCES

refcode	metd	author	reference
Bla1977a	S j	Blazit, A., Bonneau, D., Koechlin, L. & Labeyrie, A.	1977ApJ...214L..79B
Bla1977a		ApJ 214, L79, 1977
Evs2013	Hp j	Evans, N.R., Bond, H.E., Schaefer, G.H., Mason, B.D., Karovska, M., & Tingle, E.	2013AJ....146...93E
Evs2013	+X	AJ 146, 93, 2013
NOI1999	not j	Nordgren, T.E., Germain, M.E., Benson, J.A., Mozurkewich, D., Sudol, J.J., Elias,	1999AJ....118.3032N
NOI1999		II, N.M., Hajian, A.R., White, N.M., Hutter, D.J., Johnston, K.J., Gauss, F.S.,	.
NOI1999		Armstrong, J.T., Pauls, T.A. & Rickard, L.J.	.
NOI1999		AJ 118, 3032, 1999	.
NOI2001a	not j	Armstrong, J.T., Nordgren, T.E., Germain, M.E., Hajian, A.R., Hindsley, R.B.,	2001AJ....121..476A
NOI2001a		Hummel, C.A., Mozurkewich, D. & Thessin, R.N.	.
NOI2001a		AJ 121, 476, 2001	.
NOI2018	not j	Baines, E.K., Armstrong, J.T., Schmitt, H.R., Zavala, R.T., Benson, J.A., Hutter,	2018AJ....155...30B
NOI2018		D.J., Tycner, C. & van Belle, G.T.
NOI2018		AJ 155, 30, 2018

DISCOVERER

idgroup	discov	author
1	KRV	Kervella, P., Thevenin, F., & Petr-Gotzens, M.G.
10	KRV	Kervella, P., Gallenne, A., Evans, N.R., Szabados, L., Arenouu, F., Merand, A.,
10	KRV	Proto, Y., Karczmarek, P., Nardetto, N., Gieren, W. & Pietrzynski, G.
11	KRV	Kervella, P., Gallenne, A., Evans, N.R., Szabados, L., Arenouu, F., Merand, A.,
11	KRV	Nardetto, N., Gieren, W. & Pietrzynski, G.
13	KRV	Kervella, P., Borgniet, S., de Souza, A.D., Merand, A., Gallenne, A., Rivinius, T.,
13	KRV	Lacour, S., Carciofi, A., Faes, D.M., Le Bouquin, J.-B., Taormina, M., Pilecki, B.,
13	KRV	Berger, J.-P., Bendjoya, P., Klement, R., Millour, F., Janot-Pacheco, E., Spang, A.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19525+0100	EVS 2	AB	2012	1	93	0.7	1.79	9.18	F6Iab+B9V	N K	195228.36+010020.4

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

WDS 19525+0100 EVS 2 AB (Eta Aql) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 19525+0100 EVS 2 AB (Eta Aql) : MEASURES

No records found.

WDS 19525+0100 (Eta Aql) : 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 19525+0100 (Eta Aql) : ALADIN DSS IMAGE @ 19^h 52^m 28.36^s +01° 00' 20.4"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 19525+0100 EVS 2 AB (Eta Aql) : 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		19525+0100	EVS 2	AB	93	0.7
Show		19525+0100	KRV 27	AC	92	135.8
Show		19521+0051	J 497		131	3.5	11
Show		19521+0041	J 828		195	2.2	22
Show		19525+0039	STF2589		293	4.9	22
Show		19510+0126	BAL1531		197	15.8	35
Show		19552-0051	BU 830		112	2.4	43
Show		19499+0041	RST5466		85	2.2	43
Show		19497+0108	GWP2898	AB	225	4.3	43
Show		19497+0108	GWP2898	AC	240	11.8	43
Show		19510-0021	GWP2902		259	30.5	46
Show		19508-0019	GWP2900		45	150.9	49
Show		19548-0025	J 2698		270	8.5	51
Show		19552-0023	J 2563		137	4.3	56
Show		19542+0157	HZG 14	AB	93	162.0	63
Show		19527+0202	BAL1534		295	13.4	63
Show		19542+0157	ABT9002	BC	30	94.5	64
Show		19518+0204	BAL1533		344	7.6	65
Show		19527+0207	BAL1535		237	9.8	67
Show		19501-0002	GWP2899		343	4.6	68
Show		19486+0141	BAL1529	BC	220	10.3	72
Show		19486+0141	BAL1529	AB	36	22.7	72
Show		19486+0141	BAL1529	AC	32	12.4	72
Show		19476+0105	BUP 199	BC	198	29.1	73
Show		19476+0105	ENG 67	AB	108	96.0	74
Show		19476+0105	SHY 322	AD	263	999.9	74
Show		19476+0105	ENG 67	Aa,Ab	105	0.6	74
Show		19518+0216	BAL2009		236	18.7	77
Show		19561+0007	BAL 916		219	9.2	77
Show		19574+0128	J 1870		283	7.7	79
Show		19483+0007	J 2697		316	4.2	83
Show		19563+0001	BAL 917		104	16.7	83
Show		19568+0155	A 2391	AB	1	0.3	86
Show		19568+0155	STF2601	AB,C	162	7.1	86
Show		19571+0003	GWP2912		232	8.2	90
Show		19583-0037	J 1386		319	3.9	91
Show		19580+0142	BAL1538		214	16.6	92
Show		19469+0142	BAL1527		55	4.8	94
Show		19473+0154	BAL1528		36	10.1	95
Show		19571+0207	LDS1031		246	8.5	95
Show		19465-0028	BAL 915		276	3.6	96
Show		19501+0232	BAL2007		212	18.0	98
Show		19460+0126	SKF 923		143	13.6	101
Show		19461+0131	BAL1526		257	10.4	101
Show		19593+0044	BAL1209	AB	218	12.5	104
Show		19496+0235	BAL2005		286	6.5	104
Show		19543+0244	J 1291		338	3.0	108
Show		19589+0149	HJ 2914		209	13.5	109
Show		19527+0251	BAL2010		10	16.0	111
Show		19449-0051	HJ 896	AB	157	10.6	115
Show		19449-0051	HJ 896	AC	136	11.7	115

WDS 19525+0100 : COMPONENTS

	A	B
B	pa=92.8° sep=0.65"
C	pa=92.4° sep=135.76"	pa=92.4° sep=135.10"

19525+0100 A

Name	Eta Aql	Coord arcsec 2000	195228.36+010020.4	Mag	3.8	Spectral class	F6Iab (yellow-white)
PmRA	9.00	PmDE	-8.0	SAO	125159	HIP	97804
Tycho2	0480-03027-1	HD	187929	HR	7570	GC	27517
BD	BD+00 4337	Bayer	Eta Aquilae	Bayer name	Eta Aql	Flamsteed	55 Aquilae
Flamsteed name	55 Aql	FK5	746

Tycho2

Tycho2	0480-03027-1	Pflag		RAmdeg	298.11820354	DEmdeg	1.00565902
PmRA	8.4	PmDE	-8.3	E RAmdeg	3	E DEmdeg	4
E pmRA	0.6	E pmDE	0.6	EpRAm	1991.16	EpDEm	1990.73
Num	22	Q RAmdeg	1.0	Q DEmdeg	2.0	Q pmRA	1.0
Q pmDE	2.2	BTmag	5.066	E BTmag	0.014	VTmag	4.058
E VTmag	0.009	Prox	999	TYC	T	HIP	97804
CCDM		RAdeg	298.11818417	DEdeg	1.00567750	EpRA 1990	1.72
EpDE 1990	1.50	E RAdeg	3.4	E DEdeg	3.7	Posflg
Corr	0.0

SAO

SAO	125159	DelFlag		RA1950		PmRA1950	0.0005
DE1950		PmDE1950	-0.006	Vmag	4	SpType	G0p
Double code		Source	74	CatNum	746	DM	BD+00 4337
DMcomp		BDsup		HD	187929	M HD	0
GC	27517	RA1950rad	5.19202909	DE1950rad	0.01528728	PmRA2000	0.0007
PmDE2000	-0.008

Hipparcos

Catalog	H	HIP	97804	Proxy		RAhms	19 52 28.36
DEdms	+01 00 20.4	Vmag	3.87	VarFlag	3	R Vmag	T
RAdeg	298.118	DEdeg	1.00568	AstroRef		Plx	2.78
CCDM		N CCDM		Nsys		Ncomp	1
MultFlag		Source		Qual	S	M HIP
Theta		Rho		HD	187929	BD	BD+00 4337
CD		CP		Dm number	+00 4337	VIred	0.73
SpType	F6Ibv SB	R SpType		Coord arcsec 2000	195228.36+010020.4

Hipparcos 2

HIP	97804	Sn	5	So	0	Nc	1
RArad	5.2031438386	DErad	0.0175523955	Plx	2.36	PmRA	6.91
PmDE	-8.21	E RArad	0.98	E DErad	0.81	E Plx	1.04
E pmRA	1.47	E pmDE	1.04	Hpmag	4.044	E Hpmag	0.069
SHp	0.272	VA	1	BV	0.63	E BV	0.02
VI	0.73

19525+0100 B

Coord arcsec 2000	195228.40+010020.4		Mag	10		Spectral class	F3V (yellow-white)		Calc delta mag	6.2
Calc coord	yes

19525+0100 C

Coord arcsec 2000	195237.40+010014.7		Mag	20.5		Spectral class	SB (deep red)		PmRA	-2.00
PmDE	-3.0		Calc delta mag	16.7		Calc coord	yes