Coord 2000 | 13239+5456 |
Discov num | PEA 1 |
Comp | Aa,Ab |
Coord arcsec 2000 | 13 23 55.42 +54 55 31.5 |
||||
Date first | 1925 |
Date last | 2004 |
Obs | 63 |
||||||
Pa first | 247 |
Pa last | 34 |
P.A. Now (θ) | 34° |
||||||
Sep first | 0.0 |
Sep last | 0.0 |
Sep. Now (ρ) | 0" |
||||||
Mag pri | 2.23 |
Mag sec | delta mag (ΔM) | Spectral class | A1VpSrSi (white) |
||||||
Pri motion ra | +122 |
Sec motion ra | |||||||||
Pri motion dec | -020 |
Sec motion dec | |||||||||
Notes |
Show | name | SAO | coord_2000 | discov# | comp | first | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 28737 | 13239+5456 | PEA 1 | Aa,Ab | 1925 | 2004 | 63 | 34 | 0.0 | 2.23 | Y | <=== | |||
Show | Mizar, Alcor | 28737 | 13239+5456 | STF1744 | AB | 1755 | 2017 | 490 | 153 | 14.6 | 2.23 | 3.88 | 1.65 | ||
Show | 28737 | 13239+5456 | STF1744 | AC | 1831 | 2013 | 12 | 70 | 706.9 | 2.23 | 4.01 | 1.78 | |||
Show | 28737 | 13239+5456 | SMR 4 | AD | 1913 | 2013 | 9 | 100 | 493.2 | 2.23 | 7.62 | 5.39 | |||
Show | 28737 | 13239+5456 | SHY 247 | AE | 1991 | 1999 | 3 | 321 | 999.9 | 2.23 | 6.88 | 4.65 | |||
Show | 28737 | 13239+5456 | SHY 247 | AF | 1991 | 1999 | 3 | 359 | 999.9 | 2.23 | 9.86 | 7.63 | |||
Show | 28751 | 13239+5456 | PSF 1 | Ca,Cb | 2007 | 2009 | 5 | 207 | 1.0 | 4.01 | 8.00 | 3.99 | |||
Show | 28751 | 13239+5456 | SHY 248 | CE | 1991 | 1999 | 3 | 317 | 999.9 | 4.01 | 6.88 | 2.87 | |||
Show | 28751 | 13239+5456 | SHY 248 | CF | 1991 | 1999 | 3 | 355 | 999.9 | 4.01 | 9.86 | 5.85 | |||
Show | 28751 | 13239+5456 | SHY 248 | CG | 1991 | 1999 | 3 | 271 | 999.9 | 4.01 | 8.21 | 4.20 | |||
Show | 28751 | 13239+5456 | SHY 248 | CH | 1991 | 1999 | 3 | 243 | 999.9 | 4.01 | 8.63 | 4.62 |
Precise pa | 33.7 |
Precise sep | 0.008 |
Constellation | Ursa Major |
SAO | 28737 |
||||
HIP | 65378 |
Gaia DR2 | 1563590579345330944 |
HD | 116656 |
HR | 5054 |
||||
GC | 18133 |
ADS | 8891 |
GL | NN 3783A |
BD | BD+55 1598 |
||||
Bayer | Zeta Ursae Majoris |
Bayer name | Zet UMa |
Flamsteed | 79 Ursae Majoris |
Flamsteed name | 79 UMa |
||||
Distance | 26.31 |
Distance ly | 85.82 |
last precise pa | 33.7 |
last precise sep | 0.008 |
Period (P) | 20.53835d | ± 0.00005 | Periastron (T) | 47636.07d (1989.299y) | ± 0.02 | Semi-major axis (a) | 9.83m | ± 0.03 |
Eccentricity (e) | 0.5354 | ± 0.0025 | Inclination (i) | 60.5° | ± 0.3 | Longitude of periastron (ω) | 104.3° | ± 0.3 |
Node (Ω) | 106° | ± 0.4 | Note | Grade | 2 | (1=Definitive, 9=Indet.) | ||
Equinox | 2000 | Last observation | 1997 |
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
![]() Measures: green=micrometric, blue=interferometric, purple=photographic |
Period (P) | 36.5y | ± 2 | Periastron (T) | 1994.8y | ± 1 | Semi-major axis (a) | 0.78a | ± 0.03 |
Eccentricity (e) | 0.6 | ± 0.2 | Inclination (i) | 93° | ± 7 | Longitude of periastron (ω) | 287° | ± 14 |
Node (Ω) | 32° | ± 10 | Note | Grade | 9 | (1=Definitive, 9=Indet.) | ||
Equinox | Last observation |
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
![]() Measures: green=micrometric, blue=interferometric, purple=photographic |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
13239+5456 | PEA 1 | Aa,Ab | 1997 | 60 | 136 | 0.0 | 2.23 | A1VpSrSi | NO | 132355.42+545531.5 | |
13239+5456 | PEA 1 | Aa,Ab | 2004 | 63 | 34 | 0.0 | 2.23 | A1VpSrSi | NO | 132355.42+545531.5 |