Coord 2000 | 17449+3108 | Discov num | STF2213 | Comp | Coord arcsec 2000 | 17 44 50.81 +31 07 54.5 | |||||
Date first | 1825 | Date last | 2020 | Obs | 105 | ||||||
Pa first | 336 | Pa last | 327.3 | P.A. Now (θ) | 327.3° | ||||||
Sep first | 5.0 | Sep last | 4.853 | Sep. Now (ρ) | 4.853" | ||||||
Mag pri | 8.15 | Mag sec | 8.96 | delta mag (ΔM) | 0.81 | Spectral class | F8 (yellow-white) | ||||
Pri motion ra | -018 | Sec motion ra | -027 | ||||||||
Pri motion dec | -007 | Sec motion dec | +011 | ||||||||
Notes |
Name | HD 161550 | Constellation | Hercules | SAO | 66298 | HIP | 86861 | ||||
Tycho2 | 2607-00579-1 | Gaia DR2 | 4597964839165224064 | HD | 161550 | GC | 24094 | ||||
BD | BD+31 3087 | Distance | 124.69 | Distance ly | 406.74 |
refcode | metd | author | reference |
STFA | (F. Struve DD - Appendix list #1) | ................... | |
STFB | (F. Struve DD - Appendix list #2) | ................... | |
StF1833A | Ma - | Struve, F.G.W. | 1833MmRAS...5...13H |
StF1833A | +Mc | cited by Herschel (MemRAS 5, 13, 1833) | |
StF1833B | Ma - | Struve, F.G.W. | 1833AN.....10..389B |
StF1833B | cited by Bessel (AN 10, 389, 1833) | ||
StF1837 | Ma - | Struve, F.G.W. | 1837AN.....14...249 |
StF1837 | Stellarum duplicium et multiplicium mensurae micrometricae... | ||
StF1837 | (Dorpat, Academiae scientiarum caesareae petropolitaneifique), 1837 | ||
StF1844A | Ma - | Struve, F.G.W. | 1844QB43.S66....... |
StF1844A | cited by Smyth (Cycle of Celestial Objects 2, 1844) | ||
StF1852A | Ma - | Struve, F.G.W. | . |
StF1852A | cited by Bishop (Bishop Obs. Astron. Observations 1852) | ||
StF1865A | Ma - | Struve, F.G.W. | 1865AN.....64...81E |
StF1865A | cited by Engelmann (AN 64, 81, #1518, 1865) | ||
StF1875A | Ma - | Struve, F.G.W. | 1875AN.....85..323D |
StF1875A | cited by Doberck, 1875 (see Dob1875b,f,g,h) | ||
StF1878 | Ma - | Struve, F.G.W. | . |
StF1878 | Pulkova Observations 9, 1878 | ||
StF1878B | Ma - | Struve, F.G.W. | 1878Obs.....2..239G |
StF1878B | cited by Gledhill (Obs 2, 239, 1878) | ||
StF1880A | Ma - | Struve, F.G.W. | 1880Obs.....3..535G |
StF1880A | cited by Gledhill (Obs 3, 535, 1880) | ||
StF1906A | Ma - | Struve, F.G.W. | 1906QB821.B972..... |
StF1906A | cited in BDS (Burnham Double Star Cat.), 1906 | ||
StF1906B | Ma - | Struve, F.G.W. | 1906MmRAS..56....1L |
StF1906B | cited by Lewis (MemRAS 56, 1, 1906) | ||
StF1922A | Ma - | Struve, F.G.W. | 1922AN....216...49R |
StF1922A | cited by Rabe (AN 216, 49, 1922) | ||
StF1932A | Ma - | Struve, F.G.W. | 1932QB821.A43...... |
StF1932A | cited in ADS (Aitken Double Star Cat.), 1932 | ||
StF2002 | - - | Weis, J. | |
StF2002 | F. G. W. Struve's double stars : the Dorpat catalogue; the Pulkovo catalogue | ||
StF2002 | USNO Library : QB 821 .S8 W49 2002 | ||
StF2022 | - - | email note from Jan Weis: 6 July 2022 | |
StF9999 | Ma - | Struve, F.G.W. | ................... |
StF9999 | Unpublished, manuscript or reference not found. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
17449+3108 | STF2213 | 2007 | 88 | 328 | 4.9 | 8.15 | 8.96 | F8 | D | 174450.81+310754.5 | |
17449+3108 | STF2213 | 2008 | 91 | 328 | 4.6 | 8.15 | 8.96 | F8 | D | 174450.81+310754.5 | |
17449+3108 | STF2213 | 2017 | 95 | 328 | 4.7 | 8.15 | 8.96 | F8 | 174450.81+310754.5 | ||
17449+3108 | STF2213 | 2018 | 97 | 328 | 4.8 | 8.15 | 8.96 | F8 | 174450.81+310754.5 | ||
17449+3108 | STF2213 | 2019 | 102 | 327 | 4.7 | 8.15 | 8.96 | F8 | 174450.81+310754.5 | ||
17449+3108 | STF2213 | 2020 | 103 | 327 | 4.8 | 8.15 | 8.96 | F8 | 174450.81+310754.5 |
Show | date | username | difficulty | sep | sep_sigma | pa | pa_sigma | delta_mag | # | notes |
Show | 12/07/21 | northisup | easy | 4.00 | 327.00 | 1 | close in mag. |
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=331.2° sep=4.66" |
Componente originario normalizzato | AB | Name | HD 161550 | Coord arcsec 2000 | 174450.81+310754.5 | Mag | 8.15 | ||||
Spectral class | F8 (yellow-white) | PmRA | -18.00 | PmDE | -7.0 | SAO | 66298 | ||||
HIP | 86861 | Tycho2 | 2607-00579-1 | HD | 161550 | GC | 24094 | ||||
BD | BD+31 3087 |
Tycho2 | 2607-00579-1 | Pflag | RAmdeg | 266.21171138 | DEmdeg | 31.13181563 | |||||
PmRA | -17.8 | PmDE | -2.9 | E RAmdeg | 6 | E DEmdeg | 6 | ||||
E pmRA | 1.5 | E pmDE | 1.5 | EpRAm | 1991.32 | EpDEm | 1991.42 | ||||
Num | 5 | Q RAmdeg | 1.2 | Q DEmdeg | 1.0 | Q pmRA | 1.1 | ||||
Q pmDE | 1.0 | BTmag | 8.649 | E BTmag | 0.016 | VTmag | 8.150 | ||||
E VTmag | 0.012 | Prox | 47 | TYC | T | HIP | 86861 | ||||
CCDM | A | RAdeg | 266.21176056 | DEdeg | 31.13182222 | EpRA 1990 | 1.51 | ||||
EpDE 1990 | 1.61 | E RAdeg | 5.6 | E DEdeg | 5.6 | Posflg | |||||
Corr | -0.3 |
SAO | 66298 | DelFlag | RA1950 | PmRA1950 | -0.0015 | ||||||
DE1950 | PmDE1950 | 0.009 | Vmag | 8 | SpType | F8 | |||||
Double code | Source | 70 | CatNum | 24094 | DM | BD+31 3087 | |||||
DMcomp | BDsup | HD | 161550 | M HD | 0 | ||||||
GC | 24094 | RA1950rad | 4.63802513 | DE1950rad | 0.54369101 | PmRA2000 | -0.0013 | ||||
PmDE2000 | 0.01 |
Catalog | H | HIP | 86861 | Proxy | H | RAhms | 17 44 50.82 | ||||
DEdms | +31 07 54.6 | Vmag | 7.69 | VarFlag | R Vmag | H | |||||
RAdeg | 266.212 | DEdeg | 31.1318 | AstroRef | A | Plx | 9.88 | ||||
CCDM | 17448+3108 | N CCDM | I | Nsys | 1 | Ncomp | 2 | ||||
MultFlag | C | Source | Qual | A | M HIP | AB | |||||
Theta | 328 | Rho | 4.705 | HD | 161550 | BD | BD+31 3087 | ||||
CD | CP | Dm number | +31 3087 | VIred | 0.54 | ||||||
SpType | F8... | R SpType | Coord arcsec 2000 | 174450.82+310754.6 |
HIP | 86861 | Sn | 15 | So | 3 | Nc | 2 | ||||
RArad | 4.6462718085 | DErad | 0.5433528031 | Plx | 8.02 | PmRA | -27.03 | ||||
PmDE | 8.98 | E RArad | 0.55 | E DErad | 0.63 | E Plx | 0.79 | ||||
E pmRA | 0.56 | E pmDE | 0.68 | Hpmag | 7.7996 | E Hpmag | 0.0013 | ||||
SHp | 0.014 | VA | 0 | BV | 0.49 | E BV | 0.014 | ||||
VI | 0.56 |
Componente originario normalizzato | AB | Coord arcsec 2000 | 174450.64+310758.6 | Mag | 8.96 | PmRA | -27.00 | ||||
PmDE | 11.0 | Calc delta mag | 0.81 | Calc coord | yes |