Coord 2000 | 19474+1832 | Discov num | BLA 6 | Comp | Coord arcsec 2000 | 19 47 23.27 +18 32 03.3 | |||||
Date first | 1975 | Date last | 1991 | Obs | 22 | ||||||
Pa first | 137 | Pa last | 242 | P.A. Now (θ) | 141.7° | ||||||
Sep first | 0.0 | Sep last | 0.115 | Sep. Now (ρ) | 0.057" | ||||||
Mag pri | 4.32 | Mag sec | 4.95 | delta mag (ΔM) | 0.63 | Spectral class | M2II+B0V (red/blue-white) | ||||
Pri motion ra | +007 | Sec motion ra | |||||||||
Pri motion dec | +008 | Sec motion dec | |||||||||
Notes | N O (See Notes, Orbital solution) |
Name | Del Sge | Constellation | Sagitta | SAO | 105259 | HIP | 97365 | ||||
Tycho2 | 1619-03542-1 | Gaia DR2 | 1824534959598087168 | HD | 187076 | HR | 7536 | ||||
GC | 27391 | BD | BD+18 4240 | Bayer | Delta Sagittae | Bayer name | Del Sge | ||||
Flamsteed | 7 Sagittae | Flamsteed name | 7 Sge | FK5 | 743 | Distance | 182.15 | ||||
Distance ly | 594.17 | Bayer greek | δ Sge |
Period (P) | 10.11y | Periastron (T) | 1979.93y | Semi-major axis (a) | 0.051a | |||
Eccentricity (e) | 0.44 | Inclination (i) | 140° | Longitude of periastron (ω) | 257.7° | |||
Node (Ω) | 170.2° | Notes | n | Reference | Eat1995 | |||
Equinox | Last observation | Grade | 3 | (1=Definitive, 9=Indet.) |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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discov_num | notes | refcode |
BLA 6 | del Sge = 7 Sge. | |
Mk III Limb-darkened diameter 9.151 +/- 0.119 mas. | MkT2003 | |
The composite spectrum offered unfilled hope of observable duplicity. | WRH1941b | |
Disk unresolved in 1975.629 but possible binary. | Bla1977a | |
See Baize & Petit (1989) catalog of doubles with variable component. | Baz1989d | |
Malkov et al. (2012) derive dynamical and spectroscopic masses | ||
7.84 +/- 3.26 and 8.70 Msun, respectively. | Mlk2012 |
refcode | metd | author | reference |
Baz1989d | - | Baize, P. & Petit, M. | 1989A&AS...77..497B |
Baz1989d | A&AS 77, 497, 1989 | ||
Bla1977a | S j | Blazit, A., Bonneau, D., Koechlin, L. & Labeyrie, A. | 1977ApJ...214L..79B |
Bla1977a | ApJ 214, L79, 1977 | ||
Eat1995 | orb - | Eaton, J.E., Hartkopf, W.I., McAlister, H.A., & Mason, B.D. | 1995AJ....109.1856E |
Eat1995 | AJ 109, 1856, 1995 | ||
MkT2003 | Km - | Mozurkewich, D., Armstrong, J.T., Hindsley, R., Quirrenbach, A., Hummel, C.A., | 2003AJ....126.2502M |
MkT2003 | +not | Hutter, D., Johnston, K.J., Hajian, A., Elias, N.M., II, Buscher, D., & Simon, R. | |
MkT2003 | AJ 126, 2502, 2003 | ||
Mlk2012 | not - | Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. | 2012A&A...546A..69M |
Mlk2012 | A&A 546, A69, 2012 | ||
WRH1941b | J - | Wilson, R.H. | 1941PFAO....6b...1W |
WRH1941b | +Ma | Pub. Univ. Penn. 6, Pt.4, 21, 1941 | |
WRH1941b | (U and T coded observations per van den Bos, J Obs 34, 85, 1951) | 1951JO.....34...85V |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
19474+1832 | BLA 6 | 1991 | 22 | 62 | 0.1 | 4.32 | 4.95 | M2II+A0V | NOD | 194723.27+183203.3 |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
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A | |
B | pa=240.7° sep=0.11" |
Componente originario normalizzato | AB | Name | Del Sge | Coord arcsec 2000 | 194723.27+183203.3 | Mag | 4.32 | ||||
Spectral class | M2II (red) | PmRA | 7.00 | PmDE | 8.0 | SAO | 105259 | ||||
HIP | 97365 | Tycho2 | 1619-03542-1 | HD | 187076 | HR | 7536 | ||||
GC | 27391 | BD | BD+18 4240 | Bayer | Delta Sagittae | Bayer name | Del Sge | ||||
Flamsteed | 7 Sagittae | Flamsteed name | 7 Sge | FK5 | 743 |
Tycho2 | 1619-03542-1 | Pflag | RAmdeg | 296.84694950 | DEmdeg | 18.53428307 | |||||
PmRA | 5.7 | PmDE | 10.0 | E RAmdeg | 3 | E DEmdeg | 3 | ||||
E pmRA | 0.5 | E pmDE | 0.5 | EpRAm | 1991.30 | EpDEm | 1991.27 | ||||
Num | 21 | Q RAmdeg | 1.3 | Q DEmdeg | 2.0 | Q pmRA | 1.4 | ||||
Q pmDE | 2.2 | BTmag | 5.522 | E BTmag | 0.014 | VTmag | 3.956 | ||||
E VTmag | 0.009 | Prox | 999 | TYC | T | HIP | 97365 | ||||
CCDM | AB | RAdeg | 296.84693611 | DEdeg | 18.53426056 | EpRA 1990 | 1.80 | ||||
EpDE 1990 | 1.76 | E RAdeg | 3.2 | E DEdeg | 3.2 | Posflg | P | ||||
Corr | 0.1 |
SAO | 105259 | DelFlag | RA1950 | PmRA1950 | 0.0005 | ||||||
DE1950 | PmDE1950 | 0.01 | Vmag | 3.8 | SpType | +++ | |||||
Double code | Source | 74 | CatNum | 743 | DM | BD+18 4240 | |||||
DMcomp | BDsup | HD | 187076 | M HD | 9 | ||||||
GC | 27391 | RA1950rad | 5.17122358 | DE1950rad | 0.32130875 | PmRA2000 | 0.0006 | ||||
PmDE2000 | 0.009 |
Catalog | H | HIP | 97365 | Proxy | H | RAhms | 19 47 23.27 | ||||
DEdms | +18 32 03.3 | Vmag | 3.68 | VarFlag | 2 | R Vmag | H | ||||
RAdeg | 296.847 | DEdeg | 18.5343 | AstroRef | * | Plx | 7.28 | ||||
CCDM | 19474+1832 | N CCDM | I | Nsys | 1 | Ncomp | 2 | ||||
MultFlag | C | Source | Qual | A | M HIP | AB | |||||
Theta | 62 | Rho | 0.115 | HD | 187076 | BD | BD+18 4240 | ||||
CD | CP | Dm number | +18 4240 | VIred | 1.27 | ||||||
SpType | M2II + B6 | R SpType | Coord arcsec 2000 | 194723.27+183203.3 |
HIP | 97365 | Sn | 55 | So | 3 | Nc | 2 | ||||
RArad | 5.180956447 | DErad | 0.323483842 | Plx | 5.49 | PmRA | -4.31 | ||||
PmDE | 12.35 | E RArad | 0.45 | E DErad | 0.41 | E Plx | 0.72 | ||||
E pmRA | 0.53 | E pmDE | 0.44 | Hpmag | 3.8364 | E Hpmag | 0.0032 | ||||
SHp | 0.036 | VA | 2 | BV | 1.313 | E BV | 0.003 | ||||
VI | 1.27 |
Ccdm | 19474+1832 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | -0.74 | DDEs | 3.4 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 2 | Vmag | 3.8 | Sp | M1 | PmNote | * | ||||
PmRA | 7 | PmDE | 10 | Dm number | +18 4240 | Cat1 | BD | ||||
Name2 | 105259 | Cat2 | SAO | HD | 187076 | M HD | |||||
ADS BDS | M ADS BDS | N IDS | IDS | 19429N1817A | |||||||
HIC | 97365 |
Componente originario normalizzato | AB | Coord arcsec 2000 | 194723.26+183203.2 | Mag | 4.95 | Spectral class | B0V (blue-white) | ||||
Calc delta mag | 0.63 | Calc coord | yes |
Ccdm | 19474+1832 | RComp | Comp | B | Note1 | * | |||||
Note2 | Discov num | WRH | DRAs | DDEs | |||||||
R dRAs | Year | 1937 | Theta | Rho | |||||||
Obs | 1 | Vmag | Sp | A0 | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | 187077 | M HD | |||||||
ADS BDS | M ADS BDS | N | N IDS | IDS | 19429N1817B | ||||||
HIC | 97365 |