Coord 2000 | 00084+2905 | Discov num | MKT 11 | Comp | Aa,Ab | Coord arcsec 2000 | 00 08 23.17 +29 05 27.0 | ||||
Date first | 1988 | Date last | 1989 | Obs | 42 | ||||||
Pa first | 257 | Pa last | 241 | P.A. Now (θ) | 241° | ||||||
Sep first | 0.0 | Sep last | 0.014 | Sep. Now (ρ) | 0.014" | ||||||
Mag pri | 2.22 | Mag sec | 4.21 | delta mag (ΔM) | 1.99 | Spectral class | B8IVp (blue-white) | ||||
Pri motion ra | +136 | Sec motion ra | |||||||||
Pri motion dec | -163 | 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 | 73765 | 00 08 23 +29 05 27 | MKT 11 Aa,Ab | 1989 | 42 | 241 | 0.0 | 2.22 | 4.21 | 1.99 | Y | <=== | |
Show | Alpheratz | 73765 | 00 08 23 +29 05 27 | H 5 32 AB | 2020 | 49 | 286 | 93.1 | 2.22 | 11.11 | 8.89 | ||
Show | 73765 | 00 08 23 +29 05 27 | JNN 1 AC | 2009 | 2 | 5 | 6.7 | 2.29 | 19.60 | 17.31 |
Common name | Alpheratz | Constellation | Andromeda | SAO | 73765 | HIP | 677 | ||||
Tycho2 | 1735-03180-1 | HD | 358 | HR | 15 | GC | 127 | ||||
ADS | 94 | BD | BD+28 4 | Bayer | Alpha Andromedae | Bayer name | Alp And | ||||
Flamsteed | 21 Andromedae | Flamsteed name | 21 And | FK5 | 1 | Distance | 29.74 | ||||
Distance ly | 97.01 | Bayer greek | α And |
Other names | Sirrah, Sirah, Del Peg, Delta Pegasi |
Period (P) | 96.7015d | ± 0.0044 | Periastron (T) | 47374.563d (1988.583y) | ± 0.095 | Semi-major axis (a) | 24m | ± 0.13 |
Eccentricity (e) | 0.535 | ± 0.0046 | Inclination (i) | 105.6° | ± 0.23 | Longitude of periastron (ω) | 257.4° | ± 0.31 |
Node (Ω) | 284.4° | ± 0.21 | Notes | n | Reference | Pbx2000b | ||
Equinox | Last observation | Grade | 2 | (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 |
H 5 32 | 21 And = alp And = Alpheratz | |
AB: H V 32. STFB 15. A is spectroscopic binary, P = 96.7d. | ||
AB: Optical pair, based on study of relative motion of the | ||
components using the method of apparent motion parameters. | Kiy2008 | |
MKT 11 | Aa,Ab: Separations and magnitude differences derived by model fitting | |
to calibrated squared visibilities, using measurements with the Mark | ||
III interferometer. Spectroscopic and photometric data are combined | ||
with astrometry from the Mark III interferometer to derive orbital | ||
elements for the SB1 by Pan et al. | MkT1992a | |
Pourbaix gives combined solution for this resolved SB2, yielding | ||
orbital parallaxes and component masses. | Pbx2000b | |
Hipparcos astrometric solution adopted some elements from the orbit of | HIP1997d | |
Pan et al. (1992). | MkT1992a | |
Aa,Ab: Orbit determined by fitting revised Hipparcos intermediate | ||
astrometric data. Derived component masses are 4.05 +/- 0.50 and | ||
1.71 +/- 0.20 Msun. | Ren2010 | |
Aa,Ab: Malkov et al. (2012) derive dynamical, photometric, and | ||
spectroscopic masses 5.19 +/- 0.18, 4.10, and 3.09 Msun, respectively. | Mlk2012 | |
Aa,Ab: Docobo et al. (2014) use the spectroscopic elements of Pourbaix | ||
(2000), together with speckle data and the Hipparcos parallax, to | Pbx2000b | |
derive the remaining orbital elements. The resulting masses are | ||
3.84 +/- 0.29 and 1.63 +/- 0.26 Msun. | Doc2014h |
refcode | metd | author | reference |
Doc2014h | Ma j | Docobo, J.A. | ................... |
Doc2014h | private communication, 2014 | ||
Doc2014h | orb j | Docobo, J.A., Campo, P., Andrade, M., & Horch, E.P. | 2014AstBu..69..461D |
Doc2014h | Astrophys. Bull. 69, 461, 2014 | ||
HIP1997d | orb - | Hipparcos | 1997yCat.1239....0E |
HIP1997d | Hipparcos Catalog, ESA SP-1200, 1997 | ||
HIP1997d | (DMSA/O Orbital Solutions) | ||
Kiy2008 | - | Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. | 2008SvAL...32..405K |
Kiy2008 | SvAL 34, 405, 2008 | ||
MkT1992a | Km j | Pan, X.P., Shao, M., Colavita, M.M., Armstrong, J.T., Mozurkewich, D., | 1992ApJ...384..624P |
MkT1992a | +orb | Vivekanand, M., Denison, C.S., Simon, R.S., et al. | |
MkT1992a | ApJ 384, 624, 1992 | ||
Mlk2012 | not - | Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. | 2012A&A...546A..69M |
Mlk2012 | A&A 546, A69, 2012 | ||
Pbx2000b | orb - | Pourbaix, D. | 2000A&AS..145..215P |
Pbx2000b | A&AS 145, 215, 2000 | ||
Ren2010 | orb - | Ren, S. & Fu, Y. | 2010AJ....139.1975R |
Ren2010 | AJ 139, 1975, 2010 |
idgroup | discov | author |
1 | JNN | Janson, M., Brandner, W., Henning, T., & Zinnecker, H. |
2 | JNN | Janson, M., Brandner, W., Lenzen, R., Close, L., Nielsen, E., Hartung, M., |
2 | JNN | Henning, T., & Rouy, H. |
3 | JNN | Janson, M., Carson, J., Thalmann, C., McElwain, M.W., Goto, M., Crepp, J., |
3 | JNN | Wisniewski, J., Abe, L., et al. |
4 | JNN | Janson, M., Bonavita, M., Klahr, H., Lafreniere, D., Jayawardhana, R., |
4 | JNN | & Zinnecker, H. |
5 | JNN | Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S., |
5 | JNN | Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T. |
6 | JNN | Janson, M., Jayawardhana, R., Girard, J.H., Lafreniere, D., Bonavita, M., |
6 | JNN | Gizis, J., & Brandeker, A. |
7 | JNN | Janson, M., Lafreniere, D., Jayawardhana, R., Bonavita, M., Girard, J.H., |
7 | JNN | Brandeker, A., & Gizis, J.E. |
8 | JNN | Janson, M., Brandt, T.D., Moro-Martin, A., Usuda, T., Thalmann, C., Carson, J.C., |
8 | JNN | Goto, M., Currie, T., McElwain, M.W., Itoh, Y., Fukagawa, M., Crepp, J., et al. |
9 | JNN | Janson, M., Bergfors, C., Brandner, W., Kudryavtseva, N., Hormuth, F., |
9 | JNN | Hippler, S., & Henning, T. |
10 | JNN | Janson, M., Bergfors, C., Brandner, W., Bonnefoy, M., Schlieder, J., Kohler, R., |
10 | JNN | Hormuth, F., Henning, T., & Hippler, S. |
12 | JNN | Janson, M., Durkan, S., Hippler, S., Dai, X., Brandner, W., Schlieder, J., |
12 | JNN | Bonnefoy, M., & Henning, T. Jnn201 |
13 | JNN | Calissendorff, P., Janson, M., Kohler, R., Durkan, S., Hippler, S., Dai, X., |
13 | JNN | Brandner, W., Schlieder, J., & Henning, T. |
14 | JNN | Janson, M., Durkan, S., Bonnefoy, M., Rodet, L., Kohler, R., Lacour, S., Brandner, |
14 | JNN | W., Henning, R. & Girard, J. |
17 | JNN | Calissendorff, P., Janson, M., Rodet, L., Bonnefoy, M., Brandner, W., Brown-Sevilla, |
17 | JNN | S., Chauvin, G., Delorme, P., Desidera, S., Durkan, S., Fontanive, C., Gratton, R., |
17 | JNN | Hagelbe3rg, J., Henning, T., Hippler, S., Lagrange, A.-M., Langlois, M., Lazzoni, C. |
17 | JNN | Maire, A.-L., Messina, S., Meyer, M., Moller-Nsson, O., Rabus, M., Schlieder, J., |
17 | JNN | Vigan, A., Wahhaj, Z., Wildi, F. & Zurlo, A. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
00084+2905 | MKT 11 | Aa,Ab | 1989 | 42 | 241 | 0.0 | 2.22 | 4.21 | B8IVp | NO | 000823.17+290527.0 |
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 | |
Ab | pa=237.6° sep=0.01" | ||
B | pa=288.2° sep=82.26" | pa=288.2° sep=82.25" | |
C | pa=4.2° sep=6.70" | pa=4.3° sep=6.71" | pa=103.6° sep=80.90" |
Common name | Alpheratz | Other names | Sirrah, Sirah, Del Peg, Delta Pegasi | Coord arcsec 2000 | 000823.17+290527.0 | Mag | 2.22 | ||||
Spectral class | B8IVpMnHg (blue-white) | PmRA | 138.00 | PmDE | -163.0 | SAO | 73765 | ||||
HIP | 677 | Tycho2 | 1735-03180-1 | HD | 358 | HR | 15 | ||||
GC | 127 | BD | BD+28 4 | Bayer | Alpha Andromedae | Bayer name | Alp And | ||||
Flamsteed | 21 Andromedae | Flamsteed name | 21 And | FK5 | 1 |
SAO | 73765 | DelFlag | RA1950 | PmRA1950 | 0.0104 | ||||||
DE1950 | PmDE1950 | -0.158 | Vmag | 2.1 | SpType | A0p | |||||
Double code | Source | 74 | CatNum | 1 | DM | BD+28 4 | |||||
DMcomp | BDsup | HD | 358 | M HD | 0 | ||||||
GC | 127 | RA1950rad | 0.0252957 | DE1950rad | 0.5029075 | PmRA2000 | 0.0104 | ||||
PmDE2000 | -0.163 |
Catalog | H | HIP | 677 | Proxy | RAhms | 00 08 23.17 | |||||
DEdms | +29 05 27.0 | Vmag | 2.07 | VarFlag | 1 | R Vmag | H | ||||
RAdeg | 2.09653 | DEdeg | 29.0908 | AstroRef | + | Plx | 33.6 | ||||
CCDM | 00083+2905 | N CCDM | I | Nsys | 1 | Ncomp | 1 | ||||
MultFlag | O | Source | Qual | M HIP | |||||||
Theta | Rho | HD | 358 | BD | BD+28 4 | ||||||
CD | CP | Dm number | +28 4 | VIred | -0.1 | ||||||
SpType | B9p | R SpType | Coord arcsec 2000 | 000823.17+290527.0 |
HIP | 677 | Sn | 75 | So | 4 | Nc | 1 | ||||
RArad | 0.0365914186 | DErad | 0.5077307372 | Plx | 33.62 | PmRA | 137.46 | ||||
PmDE | -163.44 | E RArad | 0.27 | E DErad | 0.17 | E Plx | 0.35 | ||||
E pmRA | 0.38 | E pmDE | 0.21 | Hpmag | 2.0371 | E Hpmag | 0.0006 | ||||
SHp | 0.005 | VA | 0 | BV | -0.038 | E BV | 0.005 | ||||
VI | -0.1 |
Coord arcsec 2000 | 000823.17+290527.0 | Mag | 4.21 | Calc delta mag | 1.99 | Calc coord | yes |
Coord arcsec 2000 | 000817.21+290552.6 | Mag | 11.11 | PmRA | 3.00 | PmDE | -15.0 | ||||
Tycho2 | 1735-03181-1 | Calc delta mag | 8.89 | Calc coord | yes |
Tycho2 | 1735-03181-1 | Pflag | RAmdeg | 2.06936911 | DEmdeg | 29.09621283 | |||||
PmRA | -0.7 | PmDE | -13.2 | E RAmdeg | 58 | E DEmdeg | 67 | ||||
E pmRA | 1.9 | E pmDE | 2.0 | EpRAm | 1977.72 | EpDEm | 1971.03 | ||||
Num | 6 | Q RAmdeg | 0.5 | Q DEmdeg | 1.2 | Q pmRA | 0.5 | ||||
Q pmDE | 1.1 | BTmag | 11.591 | E BTmag | 0.106 | VTmag | 11.108 | ||||
E VTmag | 0.109 | Prox | 877 | TYC | T | HIP | |||||
CCDM | RAdeg | 2.06936444 | DEdeg | 29.09623361 | EpRA 1990 | 1.63 | |||||
EpDE 1990 | 1.63 | E RAdeg | 175.4 | E DEdeg | 159.4 | Posflg | |||||
Corr | 0.0 |
Coord arcsec 2000 | 000823.21+290533.7 | Mag | 19.6 | Calc delta mag | 17.38 | Calc coord | yes |