Coord 2000 | 17104-1544 | Discov num | BU 1118 | Comp | AB | Coord arcsec 2000 | 17 10 22.66 -15 43 30.5 | ||||
Date first | 1889 | Date last | 2021 | Obs | 246 | ||||||
Pa first | 274 | Pa last | 225.4 | P.A. Now (θ) | 223.9° | ||||||
Sep first | 0.4 | Sep last | 0.408 | Sep. Now (ρ) | 0.345" | ||||||
Mag pri | 3.05 | Mag sec | 3.27 | delta mag (ΔM) | 0.22 | Spectral class | A1IV+A1IV (white/white) | ||||
Pri motion ra | +045 | Sec motion ra | |||||||||
Pri motion dec | +064 | 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 | Sabik | 160332 | 17 10 23 -15 43 30 | BU 1118 AB | 2021 | 246 | 225 | 0.4 | 3.05 | 3.27 | 0.22 | Y | <=== |
Show | Eta Oph | 160332 | 17 10 23 -15 43 30 | BU 1118 AB,C | 2012 | 6 | 148 | 99.8 | 2.42 | 12.34 | 9.92 | ||
Show | Sabik | 160332 | 17 10 23 -15 43 30 | BU 1118 AD | 2012 | 8 | 281 | 101.2 | 2.42 | 11.20 | 8.78 | ||
Show | Sabik | 160332 | 17 10 23 -15 43 30 | DAL 52 AE | 2012 | 2 | 317 | 62.7 | 2.42 | 11.10 | 8.68 |
Common name | Sabik | Constellation | Ophiuchus | SAO | 160332 | HIP | 84012 | ||||
Tycho2 | 6232-01333-1 | HD | 155125 | HR | 6378 | GC | 23158 | ||||
ADS | 10374 | GL | Gl 656.1A | BD | BD-15 4467 | Bayer | Eta Ophiuchi | ||||
Bayer name | Eta Oph | Flamsteed | 35 Ophiuchi | Flamsteed name | 35 Oph | Distance | 27.09 | ||||
Distance ly | 88.37 | Bayer greek | η Oph |
Period (P) | 87.58y | ± 1 | Periastron (T) | 2024.68y | ± 0.5 | Semi-major axis (a) | 1.396a | ± 0.01 |
Eccentricity (e) | 0.95 | ± 0.02 | Inclination (i) | 95.2° | ± 2 | Longitude of periastron (ω) | 274.8° | ± 2 |
Node (Ω) | 38.9° | ± 1 | Notes | n | Reference | Doc2007d | ||
Equinox | 2000 | Last observation | 2006 | 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 |
BU 1118 | eta Oph = 35 Oph = Sabik. | |
Smyth notes an additional wide companion (1833.61, 260.5deg, 269") | Smy1844 | |
Measure of 1989.388 made by MAPPIT. This measure had an identification | Han1989 | |
error, position error, or misprint in the publication, which has been | ||
corrected. Measure of 1990.37 also made by MAPPIT. | Rbt1991 | |
Difficult a/e correlation, needs 20 more years of speckle observations | Sod1999 | |
Spectral types and masses of components assigned by ten Brummelaar | TtB2000 | |
et al. | ||
AB: Malkov et al. (2012) derive dynamical, photometric, and | ||
spectroscopic masses 7.05 +/- 0.51, 3.61, and 4.58 Msun, respectively. | Mlk2012 |
refcode | metd | author | reference |
Doc2007d | orb - | Docobo, J.A. & Ling, J.F. | 2007AJ....133.1209D |
Doc2007d | AJ 133, 1209, 2007 | ||
Han1989 | Sa j | Haniff, C.A., Buscher, D.F., Christou, J.C., & Ridgway, S.T. | 1989MNRAS.241P..51H |
Han1989 | MNRAS 241, 51P-56P, 1989 | ||
Mlk2012 | not - | Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. | 2012A&A...546A..69M |
Mlk2012 | A&A 546, A69, 2012 | ||
Rbt1991 | Sa - | Robertson, J.G., Bedding, T.R., Marson, R.G., Gillingham, P.R., Frater, R.H., | . |
Rbt1991 | O'Sullivan, J.D., & Norris, R.P. | ||
Rbt1991 | Proc. ASA, 9, 162-163, 1991 | ||
Smy1844 | Ma - | Smyth, W.H. | 1844QB43.S66....... |
Smy1844 | Cycle of Celestial Objects 2, 1844 | ||
Sod1999 | orb - | Soderhjelm, S. | 1999A&A...341..121S |
Sod1999 | A&A 341, 121, 1999 | ||
TtB2000 | Ac j | ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr., | 2000AJ....119.2403T |
TtB2000 | Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr. | ||
TtB2000 | AJ 119, 2403, 2000 (magnitude differences from Mt. Wilson AO) |
idgroup | discov | author |
1 | BU | Burnham, S.W. (BU 1 - 81) |
179 | DAL | Daley, J.A. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
17104-1544 | BU 1118 | AB | 2008 | 245 | 240 | 0.6 | 3.05 | 3.27 | A1IV+A1IV | NOD | 171022.66-154330.5 |
17104-1544 | BU 1118 | AB | 2009 | 257 | 235 | 0.6 | 3.05 | 3.27 | A1IV+A1IV | NOD | 171022.66-154330.5 |
17104-1544 | BU 1118 | AB | 2010 | 257 | 235 | 0.6 | 3.05 | 3.27 | A1IV A1IV | NO | 171022.66-154330.5 |
17104-1544 | BU 1118 | AB | 2014 | 222 | 232 | 0.6 | 3.05 | 3.27 | A1IV A1IV | NO | 171022.66-154330.5 |
17104-1544 | BU 1118 | AB | 2016 | 225 | 231 | 0.6 | 3.05 | 3.27 | A1IV+A1IV | NO | 171022.66-154330.5 |
17104-1544 | BU 1118 | AB | 2017 | 229 | 230 | 0.5 | 3.05 | 3.27 | A1IV+A1IV | NO | 171022.66-154330.5 |
17104-1544 | BU 1118 | AB | 2018 | 232 | 229 | 0.5 | 3.05 | 3.27 | A1IV+A1IV | NO | 171022.66-154330.5 |
17104-1544 | BU 1118 | AB | 2019 | 242 | 228 | 0.5 | 3.05 | 3.27 | A1IV+A1IV | NO | 171022.66-154330.5 |
17104-1544 | BU 1118 | AB | 2021 | 246 | 225 | 0.4 | 3.05 | 3.27 | A1IV+A1IV | NO | 171022.66-154330.5 |
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 | C | D | |
B | pa=224.3° sep=0.40" | |||
C | pa=149.0° sep=98.71" | pa=148.7° sep=98.61" | ||
D | pa=281.4° sep=97.56" | pa=281.6° sep=97.35" | pa=305.3° sep=179.61" | |
E | pa=317.6° sep=61.63" | pa=318.0° sep=61.65" | pa=324.6° sep=159.59" | pa=64.2° sep=60.08" |
Common name | Sabik | Coord arcsec 2000 | 171022.66-154330.5 | Mag | 3.05 | Spectral class | A1IV (white) | ||||
PmRA | 45.00 | PmDE | 64.0 | SAO | 160332 | HIP | 84012 | ||||
Tycho2 | 6232-01333-1 | HD | 155125 | HR | 6378 | GC | 23158 | ||||
BD | BD-15 4467 | Bayer | Eta Ophiuchi | Bayer name | Eta Oph | Flamsteed | 35 Ophiuchi | ||||
Flamsteed name | 35 Oph |
Tycho2 | 6232-01333-1 | Pflag | X | RAmdeg | DEmdeg | ||||||
PmRA | PmDE | E RAmdeg | E DEmdeg | ||||||||
E pmRA | E pmDE | EpRAm | EpDEm | ||||||||
Num | Q RAmdeg | Q DEmdeg | Q pmRA | ||||||||
Q pmDE | BTmag | 2.597 | E BTmag | 0.014 | VTmag | 2.477 | |||||
E VTmag | 0.009 | Prox | 8 | TYC | T | HIP | 84012 | ||||
CCDM | A | RAdeg | 257.59438917 | DEdeg | -15.72515972 | EpRA 1990 | 1.73 | ||||
EpDE 1990 | 1.31 | E RAdeg | 3.2 | E DEdeg | 3.4 | Posflg | D | ||||
Corr | 0.2 |
SAO | 160332 | DelFlag | RA1950 | PmRA1950 | 0.0026 | ||||||
DE1950 | PmDE1950 | 0.095 | Vmag | 2.6 | SpType | A2 | |||||
Double code | Source | 71 | CatNum | 637 | DM | BD-15 4467 | |||||
DMcomp | BDsup | HD | 155125 | M HD | 0 | ||||||
GC | 23158 | RA1950rad | 4.48334803 | DE1950rad | -0.27340043 | PmRA2000 | 0.0027 | ||||
PmDE2000 | 0.098 |
Catalog | H | HIP | 84012 | Proxy | H | RAhms | 17 10 22.66 | ||||
DEdms | -15 43 30.5 | Vmag | 2.43 | VarFlag | R Vmag | G | |||||
RAdeg | 257.594 | DEdeg | -15.7251 | AstroRef | A | Plx | 38.77 | ||||
CCDM | 17104-1544 | N CCDM | I | Nsys | 1 | Ncomp | 2 | ||||
MultFlag | C | Source | Qual | A | M HIP | AB | |||||
Theta | 251 | Rho | 0.466 | HD | 155125 | BD | BD-15 4467 | ||||
CD | CP | Dm number | -15 4467 | VIred | 0.06 | ||||||
SpType | A2.5Va | R SpType | Coord arcsec 2000 | 171022.66-154330.5 |
HIP | 84012 | Sn | 17 | So | 3 | Nc | 2 | ||||
RArad | 4.4958708926 | DErad | -0.2744556024 | Plx | 36.91 | PmRA | 40.13 | ||||
PmDE | 99.17 | E RArad | 0.97 | E DErad | 0.37 | E Plx | 0.8 | ||||
E pmRA | 1.06 | E pmDE | 0.39 | Hpmag | 2.4393 | E Hpmag | 0.0008 | ||||
SHp | 0.004 | VA | 0 | BV | 0.059 | E BV | 0.01 | ||||
VI | 0.06 |
Ccdm | 17104-1544 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | -1.33 | DDEs | 30.3 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 4 | Vmag | 3.1 | Sp | A2 | PmNote | * | ||||
PmRA | 36 | PmDE | 92 | Dm number | -15 4467 | Cat1 | BD | ||||
Name2 | Cat2 | HD | 155125 | M HD | |||||||
ADS BDS | A10374 | M ADS BDS | N IDS | IDS | 17046S1536A | ||||||
HIC | 84012 |
Coord arcsec 2000 | 171022.64-154330.8 | Mag | 3.27 | Spectral class | A1IV (white) | Calc delta mag | 0.22 | ||||
Calc coord | yes |
Ccdm | 17104-1544 | RComp | Comp | B | Note1 | * | |||||
Note2 | Discov num | BU 1118 | DRAs | DDEs | |||||||
R dRAs | Year | 1889 | Theta | Rho | |||||||
Obs | 99 | Vmag | 3.6 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A10374 | M ADS BDS | N IDS | IDS | 17046S1536B | ||||||
HIC | 84012 |
Coord arcsec 2000 | 171026.18-154455.1 | Mag | 12.34 | Spectral class | A1IV (white) | PmRA | 2.00 | ||||
PmDE | -9.0 | Calc delta mag | 9.29 | Calc coord | yes |
Ccdm | 17104-1544 | RComp | Comp | C | Note1 | ||||||
Note2 | Discov num | BU 1118 | DRAs | DDEs | |||||||
R dRAs | Year | 1911 | Theta | 143 | Rho | 94.6 | |||||
Obs | 2 | Vmag | 12.2 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A10374 | M ADS BDS | N IDS | IDS | 17046S1536C | ||||||
HIC |
Coord arcsec 2000 | 171016.04-154311.2 | Mag | 11.2 | PmRA | -16.00 | PmDE | -4.0 | ||||
Calc delta mag | 8.15 | Calc coord | yes |
Ccdm | 17104-1544 | RComp | Comp | D | Note1 | ||||||
Note2 | Discov num | BU 1118 | DRAs | DDEs | |||||||
R dRAs | Year | 1898 | Theta | 288 | Rho | 100.0 | |||||
Obs | 3 | Vmag | 10.7 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A10374 | M ADS BDS | N IDS | IDS | 17046S1536D | ||||||
HIC |
Coord arcsec 2000 | 171019.78-154245.0 | Mag | 11.1 | Calc delta mag | 8.05 | Calc coord | yes |