Coord 2000 | 04153-0739 | Discov num | STF 518 | Comp | AC | Coord arcsec 2000 | 04 15 16.32 -07 39 10.3 | ||||
Date first | 1987 | Date last | 2019 | Obs | 8 | ||||||
Pa first | 117 | Pa last | 97.4 | P.A. Now (θ) | 97.4° | ||||||
Sep first | 79.4 | Sep last | 77.514 | Sep. Now (ρ) | 77.514" | ||||||
Mag pri | 4.43 | Mag sec | 11.17 | delta mag (ΔM) | 6.74 | Spectral class | K0.5V+M5V (yellow-orange/red) | ||||
Pri motion ra | -224 | Sec motion ra | -225 | ||||||||
Pri motion dec | -342 | Sec motion dec | -341 | ||||||||
Notes | N V P (See Notes, Proper motion indicates physical, 100-year proper motion) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | Keid | 131063 | 04 15 16 -07 39 10 | STF 518 A,BC | 2019 | 107 | 102 | 82.7 | 4.43 | 9.31 | 4.88 | ||
Show | 131063 | 04 15 16 -07 39 10 | STF 518 AC | 2019 | 8 | 97 | 77.5 | 4.43 | 11.17 | 6.74 | <=== | ||
Show | 131063 | 04 15 16 -07 39 10 | STF 518 AD | 1998 | 17 | 38 | 481.4 | 4.43 | 12.62 | 8.19 | |||
Show | 131063 | 04 15 16 -07 39 10 | STF 518 AE | 1998 | 11 | 24 | 569.9 | 4.43 | 12.99 | 8.56 | |||
Show | 04 15 22 -07 39 29 | STF 518 BC | 2019 | 184 | 330 | 8.2 | 9.53 | 11.17 | 1.64 | Y | |||
Show | 04 15 22 -07 39 29 | STF 518 BD | 2014 | 4 | 28 | 456.3 | 9.53 | 12.62 | 3.09 | ||||
Show | 04 15 22 -07 39 29 | STF 518 BE | 2014 | 4 | 16 | 563.4 | 9.53 | 12.99 | 3.46 |
Common name | Keid | Var name | DY Eri | Constellation | Eridanus | SAO | 131063 | ||||
HIP | 19849 | Tycho2 | 5312-02325-1 | HD | 26965 | HR | 1325 | ||||
GC | 5138 | ADS | 3093 | GL | Gl 166A | BD | BD-07 780 | ||||
Bayer | Omicron 2 Eridani | Bayer name | Omi2 Eri | Flamsteed | 40 Eridani | Flamsteed name | 40 Eri | ||||
Distance | 4.98 | Distance ly | 16.24 | Bayer greek | ο2 Eri |
discov_num | notes | refcode |
STF 518 | A: omi 2 Eri = 40 Eri = Keid | |
LDS 114 = STFB 1. Proper motion of A -2224 -3423. | ||
C is a flare star, DY Eri, and a strong X-ray source. | ||
AE: Optical pair, based on study of relative motion of the components | ||
using the method of apparent motion parameters. | Kiy2008 | |
BC: NLTT 12868/12869 | Chm2004 | |
BC at 83" is physical, and is a Delta Scuti star showing coronal X-ray | ||
emission. | ||
See Baize & Petit (1989) catalog of doubles with variable component. | Baz1989d | |
HIP 19849. See Allen et al. (2000) for information on metallicity, | AlC2000 | |
age, galactic orbital parameters, etc. | ||
BC: Additional notes may be found in Worley (1956). | Wor1956b | |
B: M = 0.575 +/- 0.018 \msun, C: M = 0.2041 +/- 0.0064. | Msn2017d | |
P = 230.09 +/- 0.68 y. | ||
VLTI uniform disk diameter of A: 1.405 +/- 0.038 mas, | LTI2009 | |
VLTI limb-darkened disk diameter of A: 1.437 +/- 0.039 mas, | ||
R = 0.770 +/- 0.021 \rsun, Teff = 5269 +/- 35 K, | ||
M = 0.877 +/- 0.044 \msun. | ||
CHARA Array Limb-darkened diameter of A : | CIA2012f | |
R = 0.8061 +/- 0.0036 \rsun, L = 0.40782 +/-0.00319 \lsun, | ||
Teff = 5143 +/- 14 K, M = 0.816 \msun. | ||
B: Teff = 17,200 +/- 110 K, log g = 7.957 +/- 0.020, R = 0.01308 +/- | BdH2017b | |
0.00020 \rsun, M = 0.565 +/- 0.031 \msun, l = 0.01349 +/- 0.00054 | ||
\lsun. Inferred cooling age 122 Myr. Assuming a pre-WD progenitor of | ||
1.8 \msun with a lifetime of 1.7 Gyr gives a total system age of ~1.8 | ||
Gyr. It has a thin outer hydrogen layer. | ||
AD, AE: Rectilinear solutions by Friedman et al. (2011). | USN2011a | |
BD, BE: Rectilinear solutions by Mason & Hartkopf (2016). | Msn2016a |
refcode | metd | author | reference |
AlC2000 | Po - | Allen, C., Poveda, A., & Herrera, M | 2000A&A...356..529A |
AlC2000 | A&A 356, 529, 2000 | ||
Baz1989d | - | Baize, P. & Petit, M. | 1989A&AS...77..497B |
Baz1989d | A&AS 77, 497, 1989 | ||
BdH2017b | not - | Bond, H.E., Bergeron, P. & Bedard, A. | 2017ApJ...848...16B |
BdH2017b | ApJ 848, 16, 2017 | ||
Chm2004 | E - | Chaname, J. & Gould, A. | 2004ApJ...601..289C |
Chm2004 | ApJ 601, 289, 2004 | ||
Chm2004 | (Photometry, coordinates, and astrometry from rNLTT. Astrometry from early | ||
Chm2004 | versions of 2MASS and UCAC, with date given only as "circa 2000". Measures | ||
Chm2004 | identical to discovery observations - predominantly close pairs - were assumed | ||
Chm2004 | not new observations, so not included in WDS. Similar concerns when primary and | ||
Chm2004 | secondary magnitudes or proper motions were the same.) | ||
CIA2012f | not j | Boyajian, T.S., von Braun, K., van Belle, G., McAlister, H.A., ten Brummelaar, | 2012ApJ...757..112B |
CIA2012f | T.A., Kane, S.R., Muirhead, P.S., Jones, J., White, R., Schaefer, G., Ciardi, D., | . | |
CIA2012f | Henry, T., Lopez-Morales, M., Ridgway, S., Gies, D., Jao, W.-C., Rojas-Ayala, B., | . | |
CIA2012f | Parks, J.R., Sturmann, L., Sturmann, J., Turner, N.H., Farrington, C., Goldfinger, | . | |
CIA2012f | P.J. & Berger, D.H. | ||
CIA2012f | ApJ 757, 112, 2012 | . | |
Kiy2008 | - | Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. | 2008SvAL...32..405K |
Kiy2008 | SvAL 34, 405, 2008 | ||
LTI2009 | not j | Demory, B.-O., Segransan, D., Forveille, T., Queloz, D., Beuzit, J.-L., Delfosse, | 2009A&A...505..205D |
LTI2009 | X., Di Folco, E., Kervella, P., Le Bouquin, J.-B., Perrier, C., Benisty, M., | . | |
LTI2009 | Duvert, G., Hofmann, K.-H., Lopez, B. & Petrov, R. | . | |
LTI2009 | A&A 505, 205, 2009 | . | |
Msn2016a | lin - | Mason, B.D. & Hartkopf, W.I. | 2016IAUDS.189....1M |
Msn2016a | Inf. Circ. 189, 1, 2016 | ||
Msn2017d | orb j | Mason, B.D., Hartkopf, W.I. & Miles, K.N. | 2017AJ....154..200M |
Msn2017d | +not | AJ 154, 200, 2017 | |
Msn2017d | +Cu | ||
USN2011a | lin - | Friedman, E.A., Mason, B.D., & Hartkopf, W.I. | 2011IAUDS.175....1F |
USN2011a | Inf. Circ. 175, 1, 2011 | ||
Wor1956b | Ma - | Worley, C.E. | 1956AJ.....61..162W |
Wor1956b | AJ 61, 162, 1956 |
idgroup | discov | author |
1 | STF | Struve, F.G.W. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
04153-0739 | STF 518 | AC | 1992 | 2 | 97 | 77.9 | 4.43 | 11.47 | G5 | N P | 041517.57-073841.5 |
04153-0739 | STF 518 | AC | 2010 | 3 | 98 | 78.7 | 4.51 | 11.47 | G5 | NV P | 041517.57-073841.5 |
04153-0739 | STF 518 | AC | 2011 | 4 | 97 | 77.3 | 4.51 | 11.47 | G5 | NV P | 041517.57-073841.5 |
04153-0739 | STF 518 | AC | 2015 | 6 | 98 | 78.1 | 4.43 | 11.17 | K0.5V+M5V | NV P | 041516.32-073910.3 |
04153-0739 | STF 518 | AC | 2019 | 7 | 97 | 77.5 | 4.43 | 11.17 | K0.5V+M5V | NV P | 041516.32-073910.3 |
Show | date | username | difficulty | sep | sep_sigma | pa | pa_sigma | delta_mag | # | notes |
Show | 20/01/06 | Zeitgenosse | 77.20 | 98.00 | 1 | astrometric from individual coordinates in RA, DE |
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=103.0° sep=83.46" | |||
C | pa=97.5° sep=76.83" | pa=329.8° sep=10.20" | ||
D | pa=37.7° sep=479.79" | pa=28.0° sep=451.41" | pa=29.1° sep=446.12" | |
E | pa=24.1° sep=569.07" | pa=15.7° sep=559.04" | pa=16.4° sep=551.99" | pa=336.5° sep=152.18" |
Common name | Keid | Var name | omi Eri | Coord arcsec 2000 | 041516.32-073910.3 | Mag | 4.43 | ||||
Spectral class | K0.5V (yellow-orange) | PmRA | -224.00 | PmDE | -342.0 | SAO | 131063 | ||||
HIP | 19849 | Tycho2 | 5312-02325-1 | HD | 26965 | HR | 1325 | ||||
GC | 5138 | BD | BD-07 780 | Bayer | Omicron 2 Eridani | Bayer name | Omi2 Eri | ||||
Flamsteed | 40 Eridani | Flamsteed name | 40 Eri |
Tycho2 | 5312-02325-1 | 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 | 5.440 | E BTmag | 0.014 | VTmag | 4.506 | |||||
E VTmag | 0.009 | Prox | 999 | TYC | HIP | 19849 | |||||
CCDM | RAdeg | 63.82323167 | DEdeg | -7.64486750 | EpRA 1990 | 1.67 | |||||
EpDE 1990 | 1.58 | E RAdeg | 3.3 | E DEdeg | 3.5 | Posflg | |||||
Corr | -0.3 |
SAO | 131063 | DelFlag | RA1950 | PmRA1950 | -0.1501 | ||||||
DE1950 | PmDE1950 | -3.42 | Vmag | 4.5 | SpType | G5 | |||||
Double code | Source | 70 | CatNum | 5138 | DM | BD-07 780 | |||||
DMcomp | BDsup | HD | 26965 | M HD | 0 | ||||||
GC | 5138 | RA1950rad | 1.103787 | DE1950rad | -0.1349037 | PmRA2000 | -0.1507 | ||||
PmDE2000 | -3.411 |
Catalog | H | HIP | 19849 | Proxy | RAhms | 04 15 17.64 | |||||
DEdms | -07 38 40.4 | Vmag | 4.43 | VarFlag | 1 | R Vmag | G | ||||
RAdeg | 63.8235 | DEdeg | -7.64456 | AstroRef | Plx | 198.24 | |||||
CCDM | 04153-0739 | N CCDM | I | Nsys | 1 | Ncomp | 1 | ||||
MultFlag | Source | Qual | M HIP | ||||||||
Theta | Rho | HD | 26965 | BD | BD-07 780 | ||||||
CD | CP | Dm number | -07 780 | VIred | 0.89 | ||||||
SpType | K1V | R SpType | Coord arcsec 2000 | 041517.64-073840.4 |
HIP | 19849 | Sn | 5 | So | 0 | Nc | 1 | ||||
RArad | 1.1139300847 | DErad | -0.1334227169 | Plx | 200.62 | PmRA | -2240.12 | ||||
PmDE | -3420.27 | E RArad | 0.17 | E DErad | 0.14 | E Plx | 0.23 | ||||
E pmRA | 0.23 | E pmDE | 0.2 | Hpmag | 4.5615 | E Hpmag | 0.0009 | ||||
SHp | 0.006 | VA | 2 | BV | 0.82 | E BV | 0 | ||||
VI | 0.89 |
Ccdm | 04153-0739 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | -1.71 | DDEs | -10.4 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 5 | Vmag | 4.5 | Sp | G5 | PmNote | * | ||||
PmRA | -2245 | PmDE | -3419 | Dm number | -07 780 | Cat1 | BD | ||||
Name2 | 131063 | Cat2 | SAO | HD | 26965 | M HD | |||||
ADS BDS | A 3093 | M ADS BDS | N IDS | IDS | 04108S0749A | ||||||
HIC | 19849 |
Coord arcsec 2000 | 041521.79-073929.1 | Mag | 9.53 | Spectral class | DA2.9 (white dwarf) | PmRA | -223.00 | ||||
PmDE | -338.0 | Calc delta mag | 5.1 |
Ccdm | 04153-0739 | RComp | Comp | B | Note1 | ||||||
Note2 | Discov num | STF 518 | DRAs | 4.01 | DDEs | -34.7 | |||||
R dRAs | 10 | Year | 1940 | Theta | 105 | Rho | 82.8 | ||||
Obs | 31 | Vmag | 9.7 | Sp | A | PmNote | * | ||||
PmRA | -2182 | PmDE | -3440 | Dm number | -07 781 | Cat1 | BD | ||||
Name2 | 131065 | Cat2 | SAO | HD | 26976 | M HD | |||||
ADS BDS | A 3093 | M ADS BDS | N IDS | IDS | 04108S0749B | ||||||
HIC |
Var name | DY Eri | Coord arcsec 2000 | 041521.44-073920.3 | Mag | 11.17 | Spectral class | M5V (red) | ||||
PmRA | -225.00 | PmDE | -341.0 | Bayer | Omicron Eridani | Bayer name | Omi Eri | ||||
Calc delta mag | 6.74 | Calc coord | yes |
Ccdm | 04153-0739 | RComp | B | Comp | C | Note1 | * | ||||
Note2 | Discov num | STF 518 | DRAs | DDEs | |||||||
R dRAs | Year | 1959 | Theta | Rho | |||||||
Obs | 99 | Vmag | 11.7 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A 3093 | M ADS BDS | N IDS | IDS | 04108S0749C | ||||||
HIC |
Coord arcsec 2000 | 041536.03-073250.5 | Mag | 12.62 | PmRA | 3.00 | PmDE | -3.0 | ||||
Tycho2 | 5313-00183-1 | HD | 26976 | Flamsteed | 40 Eridani | Flamsteed name | 40 Eri | ||||
Calc delta mag | 8.19 | Calc coord | yes |
Tycho2 | 5313-00183-1 | Pflag | RAmdeg | 63.90173736 | DEmdeg | -7.54647480 | |||||
PmRA | 33.8 | PmDE | -41.6 | E RAmdeg | 131 | E DEmdeg | 159 | ||||
E pmRA | 4.0 | E pmDE | 4.3 | EpRAm | 1979.53 | EpDEm | 1974.55 | ||||
Num | 2 | Q RAmdeg | Q DEmdeg | Q pmRA | |||||||
Q pmDE | BTmag | 13.613 | E BTmag | 0.457 | VTmag | 12.167 | |||||
E VTmag | 0.222 | Prox | 999 | TYC | HIP | ||||||
CCDM | RAdeg | 63.90165861 | DEdeg | -7.54637722 | EpRA 1990 | 1.71 | |||||
EpDE 1990 | 1.56 | E RAdeg | 139.5 | E DEdeg | 175.2 | Posflg | |||||
Corr | 0.0 |
Ccdm | 04153-0739 | RComp | Comp | D | Note1 | ||||||
Note2 | Discov num | STF 518 | DRAs | 18.32 | DDEs | 373.0 | |||||
R dRAs | 65 | Year | 1907 | Theta | 051 | Rho | 114.2 | ||||
Obs | 12 | Vmag | 12.2 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A 3093 | M ADS BDS | N IDS | IDS | 04108S0749P | ||||||
HIC |
Coord arcsec 2000 | 041531.96-073030.9 | Mag | 12.99 | PmRA | 1.00 | PmDE | 0.0 | ||||
Calc delta mag | 8.56 | Calc coord | yes |
Ccdm | 04153-0739 | RComp | Comp | E | Note1 | ||||||
Note2 | Discov num | STF 518 | DRAs | 14.24 | DDEs | 512.1 | |||||
R dRAs | 65 | Year | 1907 | Theta | 008 | Rho | 211.0 | ||||
Obs | 5 | Vmag | 12.5 | Sp | PmNote | ||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | A 3093 | M ADS BDS | N IDS | IDS | 04108S0749Q | ||||||
HIC |