Coord 2000 | 18091+3101 | Discov num | BLL 31 | Comp | AB | Coord arcsec 2000 | 18 09 06.21 +31 01 16.1 | ||||
Date first | 1877 | Date last | 2015 | Obs | 19 | ||||||
Pa first | 321 | Pa last | 320.3 | P.A. Now (θ) | 320.3° | ||||||
Sep first | 66.9 | Sep last | 64.532 | Sep. Now (ρ) | 64.532" | ||||||
Mag pri | 10.04 | Mag sec | 11.08 | delta mag (ΔM) | 1.04 | Spectral class | M4e (red) | ||||
Pri motion ra | -005 | Sec motion ra | +014 | ||||||||
Pri motion dec | +009 | Sec motion dec | -009 | ||||||||
Notes | N (See Notes) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | T Her | 66680 | 18 09 06 +31 01 16 | BLL 31 AB | 2015 | 19 | 320 | 64.5 | 10.04 | 11.08 | 1.04 | <=== | |
Show | 18 09 03 +31 02 06 | BKO 51 BC | 2015 | 8 | 207 | 19.0 | 11.08 | 13.20 | 2.12 |
Var name | T Her | Constellation | Hercules | SAO | 66680 | HIP | 88923 | ||||
Tycho2 | 2622-01634-1 | Gaia DR2 | 4591149275824008960 | HD | 166382 | GC | 24757 | ||||
DM | BD+31 3185 | BD | BD+30 3137 | Distance | 925.93 | Distance ly | 3020.38 |
discov_num | notes | refcode |
BLL 31 | A is the Mira-type system T Her. B is BD+31@3185. |
refcode | metd | author | reference |
Bko2002 | C - | Ladanyi, T. & Berko, E. | ................... |
Bko2002 | Webb Soc., Double Star Circ. 10, 2002 | ||
Bko2003 | C u | Ladanyi, T., Berko, E. & Vaskuti, G | ................... |
Bko2003 | Webb Soc., Double Star Circ. 11, 2003 | ||
Bko2004 | C u | Berko, E., Ladanyi, T. & Vaskuti, G | ................... |
Bko2004 | Webb Soc., Double Star Circ. 12, 2004 | ||
Bko2005 | C u | Berko, E., Ladanyi, T. & Vaskuti, G | ................... |
Bko2005 | Webb Soc., Double Star Circ. 13, 2005 | ||
Bko2008 | C u | Berko, E. & Vaskuti, G. | ................... |
Bko2008 | Webb Soc., Double Star Circ. 16, 2008 | ||
Bko2008b | C u | Berko, E. | 2008JDSO....4..144B |
Bko2008b | JDSO 4, 144, 2008 | ||
Bko2009 | C u | Berko, E. | 2009JDSO....5...49B |
Bko2009 | JDSO 5, 49, 2009 | ||
Bko2009b | C u | Berko, E. | 2009JDSO....5..168B |
Bko2009b | JDSO 5, 168, 2009 | ||
Bko2009c | C u | Berko, E. | ................... |
Bko2009c | Webb Soc., Double Star Circ. 17, 2009 | ||
Bko2009d | C u | Berko, E. | 2009JDSO....5..189B |
Bko2009d | JDSO 5, 189, 2009 | ||
Bko2010a | C u | Berko, E. | 2010JDSO....6...21B |
Bko2010a | JDSO 6, 21, 2010 | ||
Bko2010b | C u | Berko, E. | ................... |
Bko2010b | Webb Soc., Double Star Circ. 18, 2010 | ||
Bko2011a | C u | Berko, E. | 2011JDSO....7....2B |
Bko2011a | JDSO 7, 2, 2011 | ||
Bko2011b | C u | Berko, E. | ................... |
Bko2011b | Webb Soc., Double Star Circ. 19, 29, 2011 (BKO 898 - BKO 980) | ||
Bko2011c | C u | Berko, E. | ................... |
Bko2011c | Webb Soc., Double Star Circ. 19, 42, 2011 (BKO 981 - BKO1042) | ||
Bko2012 | C u | Berko, E. | ................... |
Bko2012 | Webb Soc., Double Star Circ. 20, 2012 | ||
Bll1872 | orb - | Ball, R.S. | . |
Bll1872 | Proc. Royal Irish Acad., June 1872 | ||
Bll1884 | Ma j | Ball, R.S. | 1884DunOP...5....1B |
Bll1884 | Pub. Dunsink Obs. 5, 1, 1884 | ||
Bll1913A | Ma - | Ball, R.S. | 1913QB811.B8....... |
Bll1913A | cited by Burnham (Carnegie Inst. Wash. #168, 1913) | ||
Bll1932A | - | Ball, R.S. | 1932QB821.A43...... |
Bll1932A | cited in ADS (Aitken Double Star Cat.), 1932 |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
18091+3101 | BLL 31 | AB | 2002 | 12 | 321 | 65.0 | 10.04 | 11.08 | M4e | N | 180906.21+310116.1 |
18091+3101 | BLL 31 | AB | 2015 | 15 | 320 | 64.5 | 10.04 | 11.08 | M4e | N | 180906.21+310116.1 |
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=320.3° sep=64.99" | |
C | pa=304.1° sep=58.98" | pa=203.4° sep=18.49" |
Var name | T Her | Coord arcsec 2000 | 180906.21+310116.1 | Mag | 10.04 | Spectral class | M4e (red) | ||||
PmRA | -5.00 | PmDE | 9.0 | SAO | 66680 | HIP | 88923 | ||||
Tycho2 | 2622-01634-1 | HD | 166382 | GC | 24757 | BD | BD+30 3137 |
Tycho2 | 2622-01634-1 | Pflag | RAmdeg | 272.27587691 | DEmdeg | 31.02116428 | |||||
PmRA | -4.1 | PmDE | 7.1 | E RAmdeg | 19 | E DEmdeg | 18 | ||||
E pmRA | 1.4 | E pmDE | 1.3 | EpRAm | 1988.31 | EpDEm | 1988.83 | ||||
Num | 10 | Q RAmdeg | 1.4 | Q DEmdeg | 1.2 | Q pmRA | 1.4 | ||||
Q pmDE | 1.2 | BTmag | 10.990 | E BTmag | 0.045 | VTmag | 10.042 | ||||
E VTmag | 0.030 | Prox | 651 | TYC | T | HIP | 88923 | ||||
CCDM | RAdeg | 272.27589167 | DEdeg | 31.02114583 | EpRA 1990 | 1.42 | |||||
EpDE 1990 | 1.60 | E RAdeg | 20.8 | E DEdeg | 19.2 | Posflg | |||||
Corr | -0.1 |
SAO | 66680 | DelFlag | RA1950 | PmRA1950 | 0.0009 | ||||||
DE1950 | PmDE1950 | 0.006 | Vmag | 6.9 | SpType | M3e | |||||
Double code | Source | 70 | CatNum | 24757 | DM | BD+30 3137 | |||||
DMcomp | BDsup | HD | 166382 | M HD | 0 | ||||||
GC | 24757 | RA1950rad | 4.74385106 | DE1950rad | 0.54124631 | PmRA2000 | 0.0011 | ||||
PmDE2000 | 0.006 |
Catalog | H | HIP | 88923 | Proxy | RAhms | 18 09 06.21 | |||||
DEdms | +31 01 16.1 | Vmag | 9.65 | VarFlag | 3 | R Vmag | H | ||||
RAdeg | 272.276 | DEdeg | 31.0212 | AstroRef | Plx | -0.33 | |||||
CCDM | 18091+3102 | N CCDM | I | Nsys | 1 | Ncomp | 1 | ||||
MultFlag | Source | Qual | S | M HIP | |||||||
Theta | Rho | HD | 166382 | BD | BD+30 3137 | ||||||
CD | CP | Dm number | +30 3137 | VIred | 3.34 | ||||||
SpType | M2.5e-M8e | R SpType | Coord arcsec 2000 | 180906.21+310116.1 |
HIP | 88923 | Sn | 5 | So | 0 | Nc | 1 | ||||
RArad | 4.75211065 | DErad | 0.5414212225 | Plx | 1.08 | PmRA | -2.44 | ||||
PmDE | 6.59 | E RArad | 0.53 | E DErad | 0.76 | E Plx | 0.9 | ||||
E pmRA | 0.65 | E pmDE | 0.86 | Hpmag | 9.4433 | E Hpmag | 0.1753 | ||||
SHp | 1.483 | VA | 1 | BV | 1.118 | E BV | 0.037 | ||||
VI | 3.34 |
Coord arcsec 2000 | 180902.98+310206.1 | Coord calc | 180902.98+310206.1 | Mag | 11.08 | PmRA | 14.00 | ||||
PmDE | -9.0 | Tycho2 | 2622-01164-1 | DM | BD+31 3185 | Calc delta mag | 1.04 |
Tycho2 | 2622-01164-1 | Pflag | RAmdeg | 272.26244559 | DEmdeg | 31.03503268 | |||||
PmRA | 14.4 | PmDE | -10.4 | E RAmdeg | 29 | E DEmdeg | 29 | ||||
E pmRA | 1.6 | E pmDE | 1.6 | EpRAm | 1983.45 | EpDEm | 1983.27 | ||||
Num | 9 | Q RAmdeg | 1.2 | Q DEmdeg | 2.1 | Q pmRA | 1.2 | ||||
Q pmDE | 2.1 | BTmag | 11.885 | E BTmag | 0.088 | VTmag | 11.077 | ||||
E VTmag | 0.073 | Prox | 651 | TYC | T | HIP | |||||
CCDM | RAdeg | 272.26238722 | DEdeg | 31.03503694 | EpRA 1990 | 1.39 | |||||
EpDE 1990 | 1.60 | E RAdeg | 51.3 | E DEdeg | 46.1 | Posflg | |||||
Corr | -0.2 |
Coord arcsec 2000 | 180902.41+310149.1 | Mag | 13.2 | PmRA | 0.00 | PmDE | 11.0 | ||||
Calc delta mag | 3.16 | Calc coord | yes |