Coord 2000 | 21538+6237 | Discov num | S 800 | Comp | AB | Coord arcsec 2000 | 21 53 48.11 +62 36 51.9 | ||||
Date first | 1824 | Date last | 2022 | Obs | 32 | ||||||
Pa first | 145 | Pa last | 145 | P.A. Now (θ) | 145° | ||||||
Sep first | 62.5 | Sep last | 62.8 | Sep. Now (ρ) | 62.8" | ||||||
Mag pri | 7.07 | Mag sec | 7.91 | delta mag (ΔM) | 0.84 | Spectral class | B1V+B1V (blue-white/blue-white) | ||||
Pri motion ra | -003 | Sec motion ra | -003 | ||||||||
Pri motion dec | -001 | Sec motion dec | -001 | ||||||||
Notes | N (See Notes) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 19718 | 21 53 48 +62 36 52 | PET 13 Aa,Ab | 2007 | 1 | 212 | 0.1 | 7.03 | |||||
Show | EM Cep | 19718 | 21 53 48 +62 36 52 | S 800 AB | 2022 | 32 | 145 | 62.8 | 7.07 | 7.91 | 0.84 | <=== | |
Show | 19718 | 21 53 48 +62 36 52 | ES 144 AC | 2015 | 5 | 278 | 20.5 | 7.07 | 12.62 | 5.55 | |||
Show | 19719 | 21 53 53 +62 36 01 | ES 144 BD | 2015 | 8 | 43 | 23.6 | 7.07 | 12.00 | 4.93 | |||
Show | 21 53 45 +62 36 55 | PET 13 CE | 2015 | 2 | 290 | 1.2 | 11.82 |
Var name | EM Cep | Constellation | Cepheus | SAO | 19718 | HIP | 108073 | ||||
Tycho2 | 4266-02575-1 | Gaia DR2 | 2204369875668251264 | HD | 208392 | GC | 30671 | ||||
BD | BD+61 2216 | Distance | 492.61 | Distance ly | 1606.89 |
discov_num | notes | refcode |
S 800 | A is the Beta Lyrae-type system EM Cep, P = 0.81d. | |
Spectrum B0.5V+b1Ve. B is BD+61@2217, spectrum B1III/V. |
refcode | metd | author | reference |
Es_1901 | Mb - | Espin, T.E. | 1901AN....155..321E |
Es_1901 | AN 155, 321, 1901 (ES 1 - 39) | ||
Es_1902a | Ma - | Espin, T.E. | 1902AN....158..241E |
Es_1902a | +Mb | AN 158, 241, 1902 (ES 40 - 112) | |
Es_1902b | Mb - | Espin, T.E. | 1902MNRAS..62..528E |
Es_1902b | MNRAS 62, 528, 1902 | ||
Es_1902c | Mb j | Espin, T.E. | 1902MNRAS..62..402E |
Es_1902c | MNRAS 62, 402, 1902 | ||
Es_1903 | Mb - | Espin, T.E. | 1903MNRAS..63..172E |
Es_1903 | MNRAS 63, 172, 1903 (ES 113 - 150) | ||
Es_1904a | - | Espin, T.E. | 1904MNRAS..64..238E |
Es_1904a | MNRAS 64, 238, 1904 (data superceded by MNRAS 65, 710, 1905) | 1905MNRAS..65..710E | |
Es_1904b | Mb - | Espin, T.E. | 1904MNRAS..64..675E |
Es_1904b | MNRAS 64, 675, 1904 | ||
Es_1905 | Mb - | Espin, T.E. | 1905MNRAS..65..710E |
Es_1905 | MNRAS 65, 710, 1905 (ES 151 - 221) | ||
Es_1906a | Mb - | Espin, T.E. | 1906MNRAS..66..141E |
Es_1906a | MNRAS 66, 141, 1906 (ES 222 - 269) | ||
Es_1906b | Mb - | Espin, T.E. | 1906MNRAS..66..430E |
Es_1906b | MNRAS 66, 430, 1906 (ES 270 - 311) | ||
Es_1906C | Mb - | Espin, T.E. | 1906QB821.B972..... |
Es_1906C | cited in BDS (Burnham Double Star Cat.), 1906 | ||
Es_1906D | Mb - | Espin, T.E. | 1906MmRAS..56....1L |
Es_1906D | cited by Lewis (MemRAS 56, 1, 1906) | ||
Es_1907a | Mb j | Espin, T.E. | 1907MNRAS..67..190E |
Es_1907a | MNRAS 67, 190, 1907 (ES 312 - 403) | ||
Es_1907b | Mb - | Espin, T.E. | 1907MNRAS..67..495E |
Es_1907b | MNRAS 67, 495, 1907 (ES 404 - 442) | ||
Es_1908a | Mb j | Espin, T.E. | 1908MNRAS..68..202E |
Es_1908a | MNRAS 68, 202, 1908 (ES 443 - 551) | ||
Es_1908b | Mb - | Espin, T.E. | 1908MNRAS..68..523E |
Es_1908b | MNRAS 68, 523, 1908 (ES 552 - 609) | ||
Es_1908c | - | Espin, T.E. | 1908JRASC...2..248E |
Es_1908c | JRASC 2, 248, 1908 (data also in MNRAS 69, 218, 1909) | 1909MNRAS..69..218E | |
Es_1909a | Mb j | Espin, T.E. | 1909MNRAS..69..218E |
Es_1909a | MNRAS 69, 218, 1909 (ES 610 - 704) | ||
Es_1909b | Mb j | Espin, T.E. | 1909MNRAS..69..604E |
Es_1909b | MNRAS 69, 604, 1909 (ES 705 - 743) | ||
Es_1910a | Mb - | Espin, T.E. | 1910MNRAS..70..237E |
Es_1910a | MNRAS 70, 237, 1910 (ES 744 - 864) | ||
Es_1910b | Mb - | Espin, T.E. | 1910MNRAS..70..541E |
Es_1910b | MNRAS 70, 541, 1910 (ES 865 - 927) | ||
Es_1911 | Mb - | Espin, T.E. | 1911MNRAS..71..217E |
Es_1911 | MNRAS 71, 217, 1911 (ES 928 - 1051) | ||
Es_1912 | Mb - | Espin, T.E. | 1912MNRAS..72..191E |
Es_1912 | MNRAS 72, 191, 1912 (ES 1052 - 1125) | ||
Es_1913 | Mb j | Espin, T.E. | 1913MNRAS..73..162E |
Es_1913 | MNRAS 73, 162, 1913 (ES 1126 - 1191) | ||
Es_1914 | Mb j | Espin, T.E. | 1914MNRAS..74..244E |
Es_1914 | MNRAS 74, 244, 1914 (ES 1192 - 1293) | ||
Es_1915a | Mb - | Espin, T.E. | 1915MNRAS..75..203E |
Es_1915a | MNRAS 75, 203, 1915 (ES 1294 - 1356) | ||
Es_1915b | Mb - | Espin, T.E. | 1915MNRAS..75..555E |
Es_1915b | MNRAS 75, 555, 1915 (ES 1357 - 1405) | ||
Es_1915c | Mb - | Espin, T.E. | 1915MNRAS..76..210E |
Es_1915c | MNRAS 76, 210, 1915 (ES 1406 - 1479) | ||
Es_1917 | Mb - | Espin, T.E. | 1917MNRAS..77..236E |
Es_1917 | MNRAS 77, 236, 1917 (ES 1480 - 1600) | ||
Es_1918 | Mb j | Espin, T.E. | 1918MNRAS..78..189E |
Es_1918 | MNRAS 78, 189, 1918 (ES 1601 - 1705, MLB 1 - 35) | ||
Es_1919 | Mb - | Espin, T.E. | 1919MNRAS..79..211E |
Es_1919 | MNRAS 79, 211, 1919 (ES 1706 - 1768, MLB 36 - 106) | ||
Es_1920 | Mb - | Espin, T.E. | 1920MNRAS..80..329E |
Es_1920 | MNRAS 80, 329, 1920 (ES 1769 - 1805, MLB 107 - 149) | ||
Es_1921 | Mb j | Espin, T.E. | 1921MNRAS..81..232E |
Es_1921 | MNRAS 81, 232, 1921 (ES 1806 - 1864, MLB 150 - 182) | ||
Es_1922 | Mb - | Espin, T.E. | 1922MNRAS..82..187E |
Es_1922 | MNRAS 82, 187, 1922 (ES 1865 - 1933, MLB 183 - 241) | ||
Es_1923 | Mb - | Espin, T.E. | 1923MNRAS..83..154E |
Es_1923 | MNRAS 83, 154, 1923 (ES 1934 - 2006, MLB 242 - 275) | ||
Es_1924 | Mb - | Espin, T.E. | 1924MNRAS..84..162E |
Es_1924 | MNRAS 84, 162, 1924 (ES 2007 - 2078, MLB 276 - 322) | ||
Es_1925a | Mb - | Espin, T.E. | 1925MNRAS..85..276E |
Es_1925a | MNRAS 85, 276, 1925 (ES 2079 - 2137, MLB 323 - 376) | ||
Es_1925b | Mb - | Espin, T.E. | 1925MNRAS..86...79E |
Es_1925b | MNRAS 86, 79, 1925 | ||
Es_1926 | Mb - | Espin, T.E. | 1926MNRAS..86..131E |
Es_1926 | MNRAS 86, 131, 1926 (ES 2138 - 2209, MLB 377 - 440) | ||
Es_1927 | Mb - | Espin, T.E. | 1927MNRAS..87..215E |
Es_1927 | MNRAS 87, 215, 1927 (ES 2210 - 2273, MLB 441 - 510) | ||
Es_1928 | Mb - | Espin, T.E. | 1928MNRAS..88..185E |
Es_1928 | MNRAS 88, 185, 1928 (ES 2274 - 2328, MLB 511 - 551) | ||
Es_1929 | Mb - | Espin, T.E. | 1929MNRAS..89..268E |
Es_1929 | MNRAS 89, 268, 1929 (ES 2329 - 2362, MLB 552 - 591) | ||
Es_1930 | Mb - | Espin, T.E. | 1930MNRAS..90..317E |
Es_1930 | MNRAS 90, 317, 1930 (ES 2363 - 2400, MLB 592 - 630) | ||
Es_1931 | Mb - | Espin, T.E. | 1931MNRAS..91..294E |
Es_1931 | MNRAS 91, 294, 1931 (ES 2401 - 2444, MLB 631 - 673) | ||
Es_1932a | Mb - | Espin, T.E. | 1932MNRAS..92..214E |
Es_1932a | MNRAS 92, 214, 1932 (ES 2445 - 2543, MLB 674 - 732) | ||
Es_1932B | Mb - | Espin, T.E. | 1932QB821.A43...... |
Es_1932B | cited in ADS (Aitken Double Star Cat.), 1932 | ||
Es_1933 | Mb - | Espin, T.E. | 1933MNRAS..93..192E |
Es_1933 | MNRAS 93, 192, 1933 (ES 2544 - 2575, MLB 733 - 806) | ||
Es_1937A | Mb - | Espin, T.E. | 1937AnLei..18....1S |
Es_1937A | cited by Strand (Ann. Sterrew. Leiden 18, 1937) | ||
Pet2012 | Cl j | Peter, D., Feldt, M., Henning, Th., & Hormuth, F. | 2012A&A...538A..74P |
Pet2012 | A&A 538, A74, 2012 | ||
Pet2012 | [Note: Observing dates 11-14 Aug 2007 (Peter, private comm.)] | ||
S__1826 | Ma - | South, J. | 1826RSPT..116....1S |
S__1826 | Phil. Trans. R. Soc., 116, Pt.1, 1826 | ||
S__1844A | Ma - | South, J. | 1844QB43.S66....... |
S__1844A | cited by Smyth (Cycle of Celestial Objects 2, 1844) | ||
S__1852A | Ma - | South, J. | . |
S__1852A | cited by Bishop (Bishop Obs. Astron. Observations 1852) | ||
S__1880A | Ma - | South, J. | 1880MNRAS..40..497B |
S__1880A | cited by Burnham (MNRAS 40, 497, 1880) | ||
S__1906A | Ma - | South, J. | 1906MmRAS..56....1L |
S__1906A | cited by Lewis (MemRAS 56, 1, 1906) | ||
S__1906B | Ma - | South, J. | 1906QB821.B972..... |
S__1906B | cited in BDS (Burnham Double Star Cat., 1906) | ||
S__1913A | Ma - | South, J. | 1913QB811.B8....... |
S__1913A | cited by Burnham (Carnegie Inst. Wash. #168, 1913) | ||
S__1922A | Ma - | South, J. | 1922AN....216...49R |
S__1922A | cited by Rabe (AN 216, 49, 1922) |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
21538+6237 | S 800 | AB | 1999 | 26 | 145 | 62.6 | 7.07 | 7.91 | B1V | N D | 215348.11+623651.9 |
21538+6237 | S 800 | AB | 2003 | 28 | 145 | 62.3 | 7.07 | 7.91 | B1V | N D | 215348.11+623651.9 |
21538+6237 | S 800 | AB | 2016 | 28 | 145 | 62.5 | 7.07 | 7.91 | B1V+B1V | N | 215348.11+623651.9 |
21538+6237 | S 800 | AB | 2017 | 30 | 145 | 62.5 | 7.07 | 7.91 | B1V+B1V | N | 215348.11+623651.9 |
21538+6237 | S 800 | AB | 2019 | 31 | 145 | 62.7 | 7.07 | 7.91 | B1V+B1V | N | 215348.11+623651.9 |
21538+6237 | S 800 | AB | 2022 | 32 | 145 | 62.8 | 7.07 | 7.91 | B1V+B1V | N | 215348.11+623651.9 |
Show | date | username | difficulty | separation | pa_estim | interest | notes |
Show | 22/08/14 | daedalus1 | mean difficulty | separated | 145 | Seeing: Pickering 4, poor. Measures: theta 145, rho 62.8 +/- 0.133. Member of open cluster NGC7160. Primary noticeably brighter. |
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 | |
Ab | pa=196.0° sep=0.09" | ||||
B | pa=145.0° sep=62.40" | pa=144.9° sep=62.35" | |||
C | pa=278.0° sep=20.83" | pa=278.2° sep=20.82" | pa=313.7° sep=78.12" | ||
D | pa=128.0° sep=54.81" | pa=128.0° sep=54.78" | pa=23.0° sep=18.83" | pa=119.9° sep=73.59" | |
E | pa=278.9° sep=21.42" | pa=279.2° sep=21.41" | pa=313.7° sep=78.80" | pa=309.0° sep=0.68" | pa=300.0° sep=74.27" |
Var name | EM Cep | Coord arcsec 2000 | 215348.11+623651.9 | Mag | 7.07 | Spectral class | B1V (blue-white) | ||||
PmRA | -3.00 | PmDE | -1.0 | SAO | 19718 | HIP | 108073 | ||||
Tycho2 | 4266-02575-1 | HD | 208392 | GC | 30671 | BD | BD+61 2216 |
Tycho2 | 4266-02575-1 | Pflag | RAmdeg | 328.45041883 | DEmdeg | 62.61442316 | |||||
PmRA | -4.8 | PmDE | -2.1 | E RAmdeg | 4 | E DEmdeg | 4 | ||||
E pmRA | 1.4 | E pmDE | 1.5 | EpRAm | 1991.33 | EpDEm | 1991.44 | ||||
Num | 12 | Q RAmdeg | 1.0 | Q DEmdeg | 0.8 | Q pmRA | 1.1 | ||||
Q pmDE | 0.8 | BTmag | 7.259 | E BTmag | 0.015 | VTmag | 7.068 | ||||
E VTmag | 0.010 | Prox | 625 | TYC | T | HIP | 108073 | ||||
CCDM | RAdeg | 328.45044333 | DEdeg | 62.61442806 | EpRA 1990 | 1.55 | |||||
EpDE 1990 | 1.63 | E RAdeg | 4.2 | E DEdeg | 4.3 | Posflg | |||||
Corr | 0.0 |
SAO | 19718 | DelFlag | RA1950 | PmRA1950 | -0.001 | ||||||
DE1950 | PmDE1950 | 0.017 | Vmag | 7.1 | SpType | B3 | |||||
Double code | Source | 70 | CatNum | 30671 | DM | BD+61 2216 | |||||
DMcomp | BDsup | HD | 208392 | M HD | 0 | ||||||
GC | 30671 | RA1950rad | 5.72626835 | DE1950rad | 1.08869985 | PmRA2000 | -0.0007 | ||||
PmDE2000 | 0.012 |
Catalog | H | HIP | 108073 | Proxy | RAhms | 21 53 48.11 | |||||
DEdms | +62 36 51.9 | Vmag | 7.01 | VarFlag | 2 | R Vmag | H | ||||
RAdeg | 328.45 | DEdeg | 62.6144 | AstroRef | Plx | 1.39 | |||||
CCDM | 21538+6237 | N CCDM | I | Nsys | 2 | Ncomp | 1 | ||||
MultFlag | Source | Qual | S | M HIP | |||||||
Theta | Rho | HD | 208392 | BD | BD+61 2216 | ||||||
CD | CP | Dm number | +61 2216 | VIred | 0.29 | ||||||
SpType | B1IV: | R SpType | Coord arcsec 2000 | 215348.11+623651.9 |
HIP | 108073 | Sn | 5 | So | 0 | Nc | 1 | ||||
RArad | 5.732541689 | DErad | 1.0928279617 | Plx | 2.03 | PmRA | -2.52 | ||||
PmDE | -0.88 | E RArad | 0.52 | E DErad | 0.45 | E Plx | 0.54 | ||||
E pmRA | 0.6 | E pmDE | 0.47 | Hpmag | 7.0762 | E Hpmag | 0.0055 | ||||
SHp | 0.047 | VA | 1 | BV | 0.259 | E BV | 0.003 | ||||
VI | 0.29 |
Ccdm | 21538+6237 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | 0.09 | DDEs | -8.9 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 4 | Vmag | 7.1 | Sp | B3 | PmNote | * | ||||
PmRA | -14 | PmDE | -14 | Dm number | +61 2216 | Cat1 | BD | ||||
Name2 | +62 1287 | Cat2 | AGK2/3 | HD | 208392 | M HD | |||||
ADS BDS | A15434 | M ADS BDS | N IDS | IDS | 21509N6208A | ||||||
HIC | 108073 |
Coord arcsec 2000 | 215348.11+623651.8 | Calc delta mag | 7.03 | Calc coord | yes |
Coord arcsec 2000 | 215353.30+623600.8 | Coord calc | 215353.30+623600.8 | Mag | 7.07 | Spectral class | B1V (blue-white) | ||||
PmRA | -3.00 | PmDE | -1.0 | SAO | 19719 | HIP | 108080 | ||||
Tycho2 | 4266-01263-1 | HD | 208440 | BD | BD+61 2217 | Calc delta mag | 0.04 |
Tycho2 | 4266-01263-1 | Pflag | RAmdeg | 328.47209566 | DEmdeg | 62.60021310 | |||||
PmRA | -0.8 | PmDE | -1.4 | E RAmdeg | 5 | E DEmdeg | 5 | ||||
E pmRA | 2.1 | E pmDE | 2.1 | EpRAm | 1991.44 | EpDEm | 1991.48 | ||||
Num | 8 | Q RAmdeg | 0.8 | Q DEmdeg | 0.6 | Q pmRA | 0.9 | ||||
Q pmDE | 0.6 | BTmag | 7.953 | E BTmag | 0.016 | VTmag | 7.907 | ||||
E VTmag | 0.012 | Prox | 625 | TYC | T | HIP | 108080 | ||||
CCDM | RAdeg | 328.47209944 | DEdeg | 62.60021611 | EpRA 1990 | 1.61 | |||||
EpDE 1990 | 1.65 | E RAdeg | 5.2 | E DEdeg | 5.4 | Posflg | |||||
Corr | -0.1 |
SAO | 19719 | DelFlag | RA1950 | PmRA1950 | -0.002 | ||||||
DE1950 | PmDE1950 | 0 | Vmag | 8 | SpType | B8 | |||||
Double code | Source | 2 | CatNum | 1288 | DM | BD+61 2217 | |||||
DMcomp | BDsup | HD | 208440 | M HD | 0 | ||||||
GC | RA1950rad | 5.72663589 | DE1950rad | 1.08844696 | PmRA2000 | -0.0017 | |||||
PmDE2000 | -0.005 |
Catalog | H | HIP | 108080 | Proxy | RAhms | 21 53 53.30 | |||||
DEdms | +62 36 00.8 | Vmag | 7.94 | VarFlag | R Vmag | H | |||||
RAdeg | 328.472 | DEdeg | 62.6002 | AstroRef | Plx | 0.45 | |||||
CCDM | 21538+6237 | N CCDM | I | Nsys | 2 | Ncomp | 1 | ||||
MultFlag | Source | Qual | M HIP | ||||||||
Theta | Rho | HD | 208440 | BD | BD+61 2217 | ||||||
CD | CP | Dm number | +61 2217 | VIred | 0.06 | ||||||
SpType | B1V | R SpType | Coord arcsec 2000 | 215353.30+623600.8 |
HIP | 108080 | Sn | 5 | So | 0 | Nc | 1 | ||||
RArad | 5.7329195359 | DErad | 1.0925798228 | Plx | 1.22 | PmRA | -3.82 | ||||
PmDE | -1.71 | E RArad | 0.44 | E DErad | 0.4 | E Plx | 0.48 | ||||
E pmRA | 0.54 | E pmDE | 0.43 | Hpmag | 7.9594 | E Hpmag | 0.0011 | ||||
SHp | 0.012 | VA | 0 | BV | 0.025 | E BV | 0.011 | ||||
VI | 0.04 |
Ccdm | 21538+6237 | RComp | Comp | B | Note1 | ||||||
Note2 | Discov num | S 800 | DRAs | 5.40 | DDEs | -58.8 | |||||
R dRAs | 10 | Year | 1824 | Theta | 146 | Rho | 62.6 | ||||
Obs | 9 | Vmag | 8.8 | Sp | B8 | PmNote | * | ||||
PmRA | 5 | PmDE | 10 | Dm number | +61 2217 | Cat1 | BD | ||||
Name2 | +62 1288 | Cat2 | AGK2/3 | HD | 208440 | M HD | |||||
ADS BDS | A15434 | M ADS BDS | N IDS | IDS | 21509N6208B | ||||||
HIC | 108080 |
Coord arcsec 2000 | 215345.12+623654.8 | Coord calc | 215345.12+623654.8 | Mag | 11.82 | Spectral class | A2 (white) | ||||
PmRA | 13.00 | PmDE | -7.0 | Calc delta mag | 4.79 |
Coord arcsec 2000 | 215354.37+623618.1 | Mag | 12 | PmRA | 6.00 | PmDE | -3.0 | ||||
Calc delta mag | 4.97 | Calc coord | yes |
Coord arcsec 2000 | 215345.04+623655.2 | Calc delta mag | 7.03 | Calc coord | yes |