PN Me 1-1

LIKELY MILKY WAY

Constellation
Aquila

Equatorial coordinates
α = 19 39 09.819
δ = +15 56 48.220

Galactic coordinates
l = 52.5415°
b = -2.9599°

Suspected	2004^Ref
Confirmed	-
Symbiotic IR type	S?^Ref
Hot component type	shell-burning?^Ref
Outbursts	-

Identifiers

PN Me 1-1	IRAS 19368+1549	GSC2.4.2 N27A000519	AAVSO -
SIMBAD PN Me 1-1	Pan-STARRS 127132947909306140	SAO -	VSX -
GAIA DR3 4318785810234714752	SkyMapper -	WRAY -	GCVS -
2MASS J19390982+1556482	HIP -	Hen 2-441	BD -
WISE J193909.82+155648.0	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	-
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	294.7909^Ref	Parallax (mas)	0.270±0.020^Ref	Reddening E(B-V) (mag)	0.81±0.04^Ref ^{, Note}
Declination (°)	15.9467^Ref	Distance (kpc)	9.5^Ref, 6±4^Ref 3.64^Ref ^{, Note}, 3.58^Ref ^{, Note}
Galactic longitude (°)	52.5415^Ref	Proper motion in α (mas/yr)	-0.67±0.02^Ref
Galactic latitude (°)	-2.9599^Ref	Proper motion in δ (mas/yr)	-3.44±0.02^Ref

Observations

X-Ray	-	IR type	S?^Ref	Radio	Yes^Ref
X-Ray type	-	J (mag)	9.94^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	9.23^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.94^Ref	Outburst type	-
IUE	Yes^Ref	WISE W1 (mag)	8.67^Ref	Jets	Yes^Ref
FUSE	No^Ref	WISE W2 (mag)	8.53^Ref	Resolved nebula	Yes^Ref
U (mag)	-	WISE W3 (mag)	4.48^Ref	IPmax (eV)	63.45^Ref, 114?^Ref
B (mag)	14.16^Ref	WISE W4 (mag)	2.42^Ref	[O III] lines	Yes^Ref
V (mag)	11.84^Ref	IRAS 12μm (Jy)	0.44^Ref	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	1.30^Ref	[Fe VII] lines	No^Ref
I (mag)	-	IRAS 60μm (Jy)	2.15^Ref	O VI lines	Yes?^Ref
BP (mag)	12.50^Ref	IRAS 100μm (Jy)	30.60^Ref
G (mag)	12.52^Ref	AKARI S09 (Jy)	0.45^Ref
RP (mag)	11.25^Ref	AKARI S18 (Jy)	0.93^Ref

Orbit

Orbital period (days)	-	γ velocity (km/h)	-1.52±11.42^Ref	Size of giant’s orbit (AU)	-
Eccentricity	-	RV of giant (km/h)	-	Separation (AU)	-
Inclination (°)	-	Inferior conj. of giant (JD)	-	Mass function	-
Eclipses	-			Mass ratio	-
Orbital ephemeris	-

Cool component

Spectral type	K3-4 II^Ref	Mass (M_⊙)	3.5^Ref	Pulsation	-
Eff. temperature (K)	4500±100^Ref	Radius (R_⊙)	-	Type	-
IR type	S?^Ref	Luminosity (L_⊙)	370^Ref	Pulsation period (days)	-
Metallicity [Fe/H]	0.1±0.3^Ref			Pulsation ephemeris	-

Hot component

Type/Spectral type	-	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning?^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Suspected by Shen et al. (2004), it was proposed that the central star of the planetary nebula is a binary system hosting a K3-4 bright giant.

References

Pereira, C. B., Miranda, L. F., Smith, V. V. et al., 2008, A&A, 477, 2, 535, 2008A&A...477..535P
Shen, Z.-X., Liu, X.-W., Danziger, I. J., 2004, A&A, 422, 563, 2004A&A...422..563S

Last updated: April 30, 2022