Coord 2000 | 18384+6332 | Discov num | STF2377 | Comp | AB | Coord arcsec 2000 | 18 38 24.22 +63 31 58.3 | ||||
Date first | 1898 | Date last | 2018 | Obs | 25 | ||||||
Pa first | 337 | Pa last | 337.9 | P.A. Now (θ) | 337.9° | ||||||
Sep first | 16.8 | Sep last | 16.89 | Sep. Now (ρ) | 16.89" | ||||||
Mag pri | 6.97 | Mag sec | 9.83 | delta mag (ΔM) | 2.86 | Spectral class | K2III (yellow-orange) | ||||
Pri motion ra | -021 | Sec motion ra | -019 | ||||||||
Pri motion dec | +016 | Sec motion dec | +017 | ||||||||
Notes | V (Proper motion indicates physical) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | HD 172923 | 17963 | 18 38 24 +63 31 58 | STF 2377 AB | 2018 | 25 | 338 | 16.9 | 6.97 | 9.83 | 2.86 | <=== | |
Show | 17963 | 18 38 24 +63 31 58 | WAL 150 AC | 2015 | 8 | 351 | 94.9 | 6.97 | 9.66 | 2.69 |
Name | HD 172923 | Constellation | Draco | SAO | 17963 | HIP | 91393 | ||||
Tycho2 | 4219-01871-1 | Gaia DR2 | 2160231115231121024 | HD | 172923 | GC | 25545 | ||||
BD | BD+63 1445 | Distance | 602.41 | Distance ly | 1965.06 |
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. | ||
Wal1934 | Ma j | Wallenquist, A. | 1934AnBos...6....3W |
Wal1934 | Ann. Bosscha Obs. Lembang 6, Pt.2, 1934 | ||
Wal1944a | Zw - | Wallenquist, A. | 1954MeUpp...85..... |
Wal1944a | Medd. Uppsala Obs. #85, 1944 | ||
Wal1944a | (Visual measures with wedge photometer attached to 14-inch refractor. No dates | ||
Wal1944a | given for measures; default date = decade of publication added.) | ||
Wal1944b | Zw - | Wallenquist, A. | 1954MeUpp...87..... |
Wal1944b | Medd. Uppsala Obs. #87, 1944 | ||
Wal1944b | (Visual measures with wedge photometer attached to 14-inch refractor. No dates | ||
Wal1944b | given for measures; default date = decade of publication added.) | ||
Wal1947 | Zw - | Wallenquist, A. | 1947UppAn...2....2W |
Wal1947 | Ann. Uppsala Astron. Obs. 2, No.2, 1947 | ||
Wal1947 | (A catalogue containing results of the two prior series, plus additional measures | ||
Wal1947 | with the 14-inch refractor and wedge photometer) | ||
Wal1948 | Zw - | Wallenquist, A. | 1948UppAn...2....3W |
Wal1948 | Ann. Uppsala Astron Obs. 2, #3, 1948 | ||
Wal1948 | (Visual measures of southern double stars made with 17-inch refractor of La Plata | ||
Wal1948 | and wedge photometer. No dates listed; default date = decade of publication added) | ||
Wal1950 | Zd - | Wallenquist, A. | 1950MeUpp..103..... |
Wal1950 | Medd. Uppsala Obs. #103, 1950 | ||
Wal1954 | Zw - | Wallenquist, A. | 1954UppAn...4Q....W |
Wal1954 | Ann. Uppsala Astron Obs. 4, #2, 1954 | ||
Wal1954 | ("General Catalogue of Differences in Magnitude of Double Stars". Weighted mean | ||
Wal1954 | values from numerous sources) | ||
Wal1958 | Zw - | Wallenquist, A. | 1958MeUpp..118..... |
Wal1958 | Medd. Uppsala Obs. #118, 1958 |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
18384+6332 | STF2377 | AB | 2002 | 17 | 338 | 16.7 | 6.97 | 9.83 | K2III | D | 183824.22+633158.3 |
18384+6332 | STF2377 | AB | 2003 | 18 | 339 | 17.2 | 6.97 | 9.83 | K2III | D | 183824.22+633158.3 |
18384+6332 | STF2377 | AB | 2014 | 19 | 338 | 16.8 | 6.97 | 9.83 | K2III | D | 183824.22+633158.3 |
18384+6332 | STF2377 | AB | 2015 | 20 | 338 | 16.8 | 6.97 | 9.83 | K2III | 183824.22+633158.3 | |
18384+6332 | STF2377 | AB | 2017 | 21 | 338 | 16.9 | 6.97 | 9.83 | K2III | 183824.22+633158.3 | |
18384+6332 | STF2377 | AB | 2018 | 23 | 339 | 16.9 | 6.97 | 9.83 | K2III | 183824.22+633158.3 |
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 | |
B | pa=349.7° sep=15.90" | |
C | pa=355.7° sep=93.81" | pa=357.0° sep=78.01" |
Name | HD 172923 | Coord arcsec 2000 | 183824.22+633158.3 | Mag | 6.97 | Spectral class | K2III (yellow-orange) | ||||
PmRA | -21.00 | PmDE | 16.0 | SAO | 17963 | HIP | 91396 | ||||
Tycho2 | 4219-01871-1 | HD | 172923 | GC | 25545 | BD | BD+63 1445 |
Tycho2 | 4219-01871-1 | Pflag | RAmdeg | 279.60091181 | DEmdeg | 63.53286364 | |||||
PmRA | -19.4 | PmDE | 15.9 | E RAmdeg | 4 | E DEmdeg | 5 | ||||
E pmRA | 1.3 | E pmDE | 1.4 | EpRAm | 1991.49 | EpDEm | 1991.39 | ||||
Num | 10 | Q RAmdeg | 1.0 | Q DEmdeg | 0.8 | Q pmRA | 0.8 | ||||
Q pmDE | 0.8 | BTmag | 8.326 | E BTmag | 0.016 | VTmag | 6.970 | ||||
E VTmag | 0.010 | Prox | 169 | TYC | T | HIP | 91396 | ||||
CCDM | A | RAdeg | 279.60101306 | DEdeg | 63.53282667 | EpRA 1990 | 1.66 | ||||
EpDE 1990 | 1.60 | E RAdeg | 4.4 | E DEdeg | 4.5 | Posflg | |||||
Corr | -0.1 |
SAO | 17963 | DelFlag | RA1950 | PmRA1950 | -0.005 | ||||||
DE1950 | PmDE1950 | 0.023 | Vmag | 6.9 | SpType | K0 | |||||
Double code | Source | 70 | CatNum | 25545 | DM | BD+63 1445 | |||||
DMcomp | BDsup | HD | 172923 | M HD | 0 | ||||||
GC | 25545 | RA1950rad | 4.87839375 | DE1950rad | 1.10804796 | PmRA2000 | -0.0042 | ||||
PmDE2000 | 0.022 |
Catalog | H | HIP | 91396 | Proxy | RAhms | 18 38 24.24 | |||||
DEdms | +63 31 58.2 | Vmag | 6.85 | VarFlag | R Vmag | H | |||||
RAdeg | 279.601 | DEdeg | 63.5328 | AstroRef | A | Plx | 5.26 | ||||
CCDM | 18384+6332 | N CCDM | I | Nsys | 2 | Ncomp | 1 | ||||
MultFlag | C | Source | P | Qual | A | M HIP | |||||
Theta | Rho | HD | 172923 | BD | BD+63 1445 | ||||||
CD | CP | Dm number | +63 1445 | VIred | 1.09 | ||||||
SpType | K0 | R SpType | Coord arcsec 2000 | 183824.24+633158.2 |
HIP | 91396 | Sn | 95 | So | 3 | Nc | 1 | ||||
RArad | 4.8799582899 | DErad | 1.1088570137 | Plx | 4.38 | PmRA | -19.91 | ||||
PmDE | 15.74 | E RArad | 0.54 | E DErad | 0.59 | E Plx | 0.56 | ||||
E pmRA | 0.63 | E pmDE | 0.69 | Hpmag | 7.0146 | E Hpmag | 0.0068 | ||||
SHp | 0.018 | VA | 0 | BV | 1.14 | E BV | 0.01 | ||||
VI | 1.1 |
Ccdm | 18384+6332 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | 0.16 | DDEs | -2.1 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 2 | Vmag | 7.1 | Sp | K0 | PmNote | * | ||||
PmRA | -27 | PmDE | 13 | Dm number | +63 1445 | Cat1 | BD | ||||
Name2 | +63 971 | Cat2 | AGK2/3 | HD | 172923 | M HD | |||||
ADS BDS | A11559 | M ADS BDS | N IDS | IDS | 18377N6326A | ||||||
HIC | 91396 |
Coord arcsec 2000 | 183823.80+633213.9 | Mag | 9.83 | PmRA | -19.00 | PmDE | 17.0 | ||||
HIP | 91393 | Calc delta mag | 2.86 | Calc coord | yes |
Catalog | H | HIP | 91393 | Proxy | RAhms | 18 38 23.31 | |||||
DEdms | +63 32 13.8 | Vmag | 9.83 | VarFlag | R Vmag | H | |||||
RAdeg | 279.597 | DEdeg | 63.5372 | AstroRef | B | Plx | 14.22 | ||||
CCDM | 18384+6332 | N CCDM | I | Nsys | 2 | Ncomp | 1 | ||||
MultFlag | C | Source | I | Qual | A | M HIP | |||||
Theta | Rho | HD | BD | ||||||||
CD | CP | Dm number | VIred | 0.7 | |||||||
SpType | R SpType | Coord arcsec 2000 | 183823.31+633213.8 |
HIP | 91393 | Sn | 95 | So | 3 | Nc | 1 | ||||
RArad | 4.8798900529 | DErad | 1.1089327479 | Plx | 1.66 | PmRA | -17.63 | ||||
PmDE | 11.8 | E RArad | 1.57 | E DErad | 1.64 | E Plx | 1.66 | ||||
E pmRA | 1.63 | E pmDE | 2.12 | Hpmag | 10.1632 | E Hpmag | 0.1034 | ||||
SHp | 0 | VA | 0 | BV | 0.664 | E BV | 0.051 | ||||
VI | 0.73 |
Ccdm | 18384+6332 | RComp | Comp | B | Note1 | ||||||
Note2 | Discov num | STF2377 | DRAs | -0.81 | DDEs | 13.1 | |||||
R dRAs | 10 | Year | 1900 | Theta | 340 | Rho | 16.5 | ||||
Obs | 6 | Vmag | 8.7 | Sp | PmNote | * | |||||
PmRA | -35 | PmDE | 5 | Dm number | Cat1 | ||||||
Name2 | +63 970 | Cat2 | AGK2/3 | HD | M HD | ||||||
ADS BDS | A11559 | M ADS BDS | N | N IDS | IDS | 18377N6326B | |||||
HIC | 91393 |
Coord arcsec 2000 | 183823.18+633331.8 | Mag | 9.66 | PmRA | -1.00 | PmDE | -2.0 | ||||
Tycho2 | 4219-01847-1 | Calc delta mag | 2.69 | Calc coord | yes |
Tycho2 | 4219-01847-1 | Pflag | RAmdeg | 279.59106657 | DEmdeg | 63.55892920 | |||||
PmRA | -3.2 | PmDE | -6.8 | E RAmdeg | 18 | E DEmdeg | 22 | ||||
E pmRA | 3.1 | E pmDE | 3.1 | EpRAm | 1990.79 | EpDEm | 1989.93 | ||||
Num | 4 | Q RAmdeg | 1.2 | Q DEmdeg | 0.7 | Q pmRA | 1.1 | ||||
Q pmDE | 0.7 | BTmag | 11.551 | E BTmag | 0.072 | VTmag | 9.661 | ||||
E VTmag | 0.026 | Prox | 790 | TYC | T | HIP | |||||
CCDM | RAdeg | 279.59108778 | DEdeg | 63.55894556 | EpRA 1990 | 1.72 | |||||
EpDE 1990 | 1.53 | E RAdeg | 19.0 | E DEdeg | 23.6 | Posflg | |||||
Corr | -0.1 |