Coord 2000 | 20474+3629 | Discov num | STT 413 | Comp | AB | Coord arcsec 2000 | 20 47 24.53 +36 29 26.7 | ||||
Date first | 1842 | Date last | 2022 | Obs | 425 | ||||||
Pa first | 117 | Pa last | 0.5 | P.A. Now (θ) | 0.5° | ||||||
Sep first | 0.7 | Sep last | 0.935 | Sep. Now (ρ) | 0.935" | ||||||
Mag pri | 4.73 | Mag sec | 6.26 | delta mag (ΔM) | 1.53 | Spectral class | B5Ve (blue-white) | ||||
Pri motion ra | +015 | Sec motion ra | |||||||||
Pri motion dec | -008 | Sec motion dec | |||||||||
Notes | N O (See Notes, Orbital solution) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 70505 | 20 47 25 +36 29 27 | MCA 63 Aa,Ab | 2012 | 24 | 46 | 0.1 | 5.40 | 5.80 | 0.40 | Y | ||
Show | Lam Cyg | 70505 | 20 47 25 +36 29 27 | STT 413 AB | 2022 | 425 | 1 | 0.9 | 4.73 | 6.26 | 1.53 | Y | <=== |
Show | 70505 | 20 47 25 +36 29 27 | S 765 AC | 2018 | 28 | 106 | 82.8 | 4.76 | 9.65 | 4.89 | |||
Show | 70505 | 20 47 25 +36 29 27 | FYM 126 AF | 2012 | 3 | 119 | 52.0 | 4.76 | 14.00 | 9.24 | |||
Show | 20 47 31 +36 29 04 | FYM 126 CD | 2015 | 6 | 112 | 9.4 | 9.65 | 14.00 | 4.35 | ||||
Show | 20 47 31 +36 29 04 | FYM 126 CE | 2012 | 3 | 207 | 40.1 | 9.65 | 13.60 | 3.95 |
Name | Lam Cyg | Constellation | Cygnus | SAO | 70505 | HIP | 102589 | ||||
Tycho2 | 2699-03425-1 | Gaia DR2 | 1870779903225039872 | HD | 198183 | HR | 7963 | ||||
GC | 28994 | ADS | 14296 | BD | BD+35 4267 | Bayer | Lambda Cygni | ||||
Bayer name | Lam Cyg | Flamsteed | 54 Cygni | Flamsteed name | 54 Cyg | Distance | 235.85 | ||||
Distance ly | 769.34 | Bayer greek | λ Cyg |
Period (P) | 800.7968y | ± 382.2193 | Periastron (T) | 1836.8376y | ± 43.4714 | Semi-major axis (a) | 0.96104a | ± 0.22777 |
Eccentricity (e) | 0.44363 | ± 0.19446 | Inclination (i) | 144.665° | ± 13.111 | Longitude of periastron (ω) | 300.9° | ± 28.471 |
Node (Ω) | 67.923° | ± 82.533 | Notes | n | Reference | Izm2019 | ||
Equinox | Last observation | 2014 | Grade | 4 | (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 |
MCA 63 | Aa,Ab: lam Cyg = 54 Cyg. A is a spectroscopic binary, which has now | |
been resolved by interferometry into a close and rapidly moving pair. | ||
1986.567: The separation of this partially resolved pair was | ||
calculated under the assumption of zero or otherwise known magnitude | ||
difference. | Tok1985 | |
STT 413 | Only elements P and T have been amended by Starikova (1982) from the | Sta1982b |
orbit of Baize (1983). | Baz1983a | |
See Baize & Petit (1989) catalog of doubles with variable component. | Baz1989d | |
S 765 | AC: H 6 32. | MEv2010 |
refcode | metd | author | reference |
Baz1983a | orb - | Baize, P. | 1983A&AS...51..479B |
Baz1983a | A&AS 51, 479, 1983 | ||
Baz1989d | - | Baize, P. & Petit, M. | 1989A&AS...77..497B |
Baz1989d | A&AS 77, 497, 1989 | ||
Izm2019 | orb u | Izmailov, I.S. | 2019AstL...45...30I |
Izm2019 | Ast. Lett. 45, 30, 2019 | ||
Izm2019 | (Orbital elements from weighted solutions used when available (Table 2), | ||
Izm2019 | unweighted elements (Table 1) used for remaining 29 systems.) | ||
MEv2010 | - | MacEvoy, B. | ................... |
MEv2010 | private communication, 2010 (see http://www.handprint.com/ASTRO/index.html) | ||
Sta1982b | orb - | Starikova, G.A. | 1982SvAL....8..166S |
Sta1982b | SvAL 8, 166, 1982 (Pisma Astron. Zhur. 8, 306, 1982) | ||
Tok1985 | Ig u | Tokovinin, A.A. | 1985A&AS...61..483T |
Tok1985 | A&AS 61, 483, 1985 |
idgroup | discov | author |
1 | FYM | Fay, M. |
28 | MCA | McAlister, H.A. |
73 | MCA | McAlister, H.A., Hartkopf, W.I., Bagnuolo, W.G., Sowell, J.R., Franz, O.G., & |
73 | MCA | Evans, D.S. |
88 | MCA | Fu, H.-H., Hartkopf, W.I., Mason, B.D., McAlister, H.A., Dombrowski, E.G., & |
88 | MCA | Franz, O.G. |
89 | S | South, J. |
104 | STT | Struve, O. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
20474+3629 | STT 413 | AB | 2007 | 400 | 4 | 0.9 | 4.73 | 6.26 | NOD | 204724.53+362926.7 | |
20474+3629 | STT 413 | AB | 2010 | 409 | 3 | 0.9 | 4.73 | 6.26 | NOD | 204724.53+362926.7 | |
20474+3629 | STT 413 | AB | 2013 | 417 | 5 | 1.0 | 4.73 | 6.26 | B5Ve | NOD | 204724.53+362926.7 |
20474+3629 | STT 413 | AB | 2014 | 402 | 5 | 0.9 | 4.73 | 6.26 | B5Ve | NOD | 204724.53+362926.7 |
20474+3629 | STT 413 | AB | 2015 | 405 | 2 | 1.0 | 4.73 | 6.26 | B5Ve | NO | 204724.53+362926.7 |
20474+3629 | STT 413 | AB | 2016 | 408 | 4 | 1.1 | 4.73 | 6.26 | B5Ve | NO | 204724.53+362926.7 |
20474+3629 | STT 413 | AB | 2017 | 418 | 6 | 1.0 | 4.73 | 6.26 | B5Ve | NO | 204724.53+362926.7 |
20474+3629 | STT 413 | AB | 2018 | 419 | 2 | 0.9 | 4.73 | 6.26 | B5Ve | NO | 204724.53+362926.7 |
20474+3629 | STT 413 | AB | 2020 | 424 | 1 | 0.9 | 4.73 | 6.26 | B5Ve | NO | 204724.53+362926.7 |
20474+3629 | STT 413 | AB | 2022 | 425 | 1 | 0.9 | 4.73 | 6.26 | B5Ve | NO | 204724.53+362926.7 |
Show | date | username | difficulty | separation ⇓ | pa_estim | interest | notes |
Show | 18/09/17 | rbotero | very difficult | oblunged | interesting but to observe in better conditions | Very difficult in variable seeing. Secondary white blue and looks like fattening of primery white DR. PA0 |
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 | Ab | B | C | D | E | |
Ab | pa=40.0° sep=0.05" | |||||
B | pa=0.4° sep=0.93" | pa=358.4° sep=0.90" | ||||
C | pa=105.5° sep=83.33" | pa=105.5° sep=83.31" | pa=106.1° sep=83.58" | |||
D | pa=106.4° sep=91.04" | pa=106.4° sep=91.02" | pa=106.9° sep=91.30" | pa=116.3° sep=7.84" | ||
E | pa=131.4° sep=87.58" | pa=131.4° sep=87.58" | pa=131.9° sep=88.20" | pa=202.3° sep=38.61" | pa=213.9° sep=38.85" | |
F | pa=124.4° sep=44.38" | pa=124.4° sep=44.38" | pa=125.4° sep=44.91" | pa=266.3° sep=43.78" | pa=270.7° sep=50.71" | pa=318.5° sep=43.87" |
Name | Lam Cyg | Coord arcsec 2000 | 204724.53+362926.7 | Mag | 4.73 | Spectral class | B5Ve (blue-white) | ||||
PmRA | 15.00 | PmDE | -8.0 | SAO | 70505 | HIP | 102589 | ||||
Tycho2 | 2699-03425-1 | HD | 198183 | HR | 7963 | GC | 28994 | ||||
BD | BD+35 4267 | Bayer | Lambda Cygni | Bayer name | Lam Cyg | Flamsteed | 54 Cygni | ||||
Flamsteed name | 54 Cyg |
Tycho2 | 2699-03425-1 | Pflag | X | RAmdeg | DEmdeg | ||||||
PmRA | PmDE | E RAmdeg | E DEmdeg | ||||||||
E pmRA | E pmDE | EpRAm | EpDEm | ||||||||
Num | Q RAmdeg | Q DEmdeg | Q pmRA | ||||||||
Q pmDE | BTmag | 4.601 | E BTmag | 0.014 | VTmag | 4.734 | |||||
E VTmag | 0.009 | Prox | 9 | TYC | T | HIP | 102589 | ||||
CCDM | A | RAdeg | 311.85219500 | DEdeg | 36.49073833 | EpRA 1990 | 1.54 | ||||
EpDE 1990 | 1.68 | E RAdeg | 3.2 | E DEdeg | 3.2 | Posflg | D | ||||
Corr | 0.1 |
SAO | 70505 | DelFlag | RA1950 | PmRA1950 | 0.0005 | ||||||
DE1950 | PmDE1950 | -0.003 | Vmag | 4.5 | SpType | B5 | |||||
Double code | Source | 71 | CatNum | 784 | DM | BD+35 4267 | |||||
DMcomp | BDsup | HD | 198183 | M HD | 0 | ||||||
GC | 28994 | RA1950rad | 5.43433939 | DE1950rad | 0.63366093 | PmRA2000 | 0.0007 | ||||
PmDE2000 | -0.005 |
Catalog | H | HIP | 102589 | Proxy | H | RAhms | 20 47 24.53 | ||||
DEdms | +36 29 26.7 | Vmag | 4.53 | VarFlag | 2 | R Vmag | G | ||||
RAdeg | 311.852 | DEdeg | 36.4907 | AstroRef | A | Plx | 3.71 | ||||
CCDM | 20475+3629 | N CCDM | I | Nsys | 1 | Ncomp | 2 | ||||
MultFlag | C | Source | Qual | A | M HIP | AB | |||||
Theta | 12 | Rho | 0.867 | HD | 198183 | BD | BD+35 4267 | ||||
CD | CP | Dm number | +35 4267 | VIred | -0.12 | ||||||
SpType | B6IV | R SpType | Coord arcsec 2000 | 204724.53+362926.7 |
HIP | 102589 | Sn | 17 | So | 3 | Nc | 2 | ||||
RArad | 5.4428475961 | DErad | 0.6368835017 | Plx | 4.24 | PmRA | 14.71 | ||||
PmDE | -8.96 | E RArad | 0.26 | E DErad | 0.39 | E Plx | 0.43 | ||||
E pmRA | 0.32 | E pmDE | 0.49 | Hpmag | 4.5206 | E Hpmag | 0.0022 | ||||
SHp | 0.021 | VA | 2 | BV | -0.083 | E BV | 0.015 | ||||
VI | -0.12 |
Coord arcsec 2000 | 204724.53+362926.7 | Mag | 5.8 | Calc delta mag | 0.4 | Calc coord | yes |
Coord arcsec 2000 | 204724.53+362927.6 | Mag | 6.26 | Calc delta mag | 0.86 | Calc coord | yes |
Coord arcsec 2000 | 204731.19+362904.5 | Coord calc | 204731.19+362904.5 | Mag | 9.65 | Spectral class | K2III (yellow-orange) | ||||
PmRA | -10.00 | PmDE | -19.0 | Calc delta mag | 4.25 |
Coord arcsec 2000 | 204731.77+362901.0 | Mag | 14 | Spectral class | IV | Calc delta mag | 8.6 | ||||
Calc coord | yes |
Coord arcsec 2000 | 204729.98+362828.8 | Mag | 13.6 | Spectral class | IV | Calc delta mag | 8.2 | ||||
Calc coord | yes |
Coord arcsec 2000 | 204727.57+362901.6 | Mag | 14 | Calc delta mag | 8.6 | Calc coord | yes |