04153-0739 STF 518 A,BC (Keid)
04h 15m 16.32s -07° 39' 10.3" P.A. 102.00 sep 82.7 mag 4.43,9.31 Sp K0.5V+DA3 dist. 4.98 pc (16.24 l.y.)
| Coord 2000 | 04153-0739 | Discov num | STF 518 | Comp | A,BC | Coord arcsec 2000 | 04 15 16.32 -07 39 10.3 | ||||
| Date first | 1783 | Date last | 2019 | Obs | 107 | ||||||
| Pa first | 108 | Pa last | 101.9 | P.A. Now (θ) | 101.9° | ||||||
| Sep first | 89.2 | Sep last | 82.691 | Sep. Now (ρ) | 82.691" | ||||||
| Mag pri | 4.43 | Mag sec | 9.31 | delta mag (ΔM) | 4.88 | Spectral class | K0.5V+DA3 (yellow-orange/white dwarf) | ||||
| Pri motion ra | -224 | Sec motion ra | -223 | ||||||||
| Pri motion dec | -342 | Sec motion dec | -338 | ||||||||
| Notes | N V P (See Notes, Proper motion indicates physical, 100-year proper motion) | ||||||||||
04153-0739 SYSTEM COMPONENTS
| 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 |
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| 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 |
WDS 04153-0739 STF 518 A,BC (Keid) : NOTES
| 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 |
REFERENCES
| 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 |
DISCOVERER
| idgroup | discov | author |
| 1 | STF | Struve, F.G.W. |
WDS HISTORIC DATA
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 04153-0739 | STF 518 | A,BC | 2008 | 96 | 104 | 83.8 | 4.51 | 9.70 | G9V | NVDP | 041517.57-073841.5 |
| 04153-0739 | STF 518 | A,BC | 2010 | 98 | 103 | 82.9 | 4.51 | 9.70 | G9V+DA | NVDP | 041517.57-073841.5 |
| 04153-0739 | STF 518 | A,BC | 2011 | 99 | 102 | 82.4 | 4.51 | 9.70 | G9V DA | NVDP | 041517.57-073841.5 |
| 04153-0739 | STF 518 | A,BC | 2016 | 102 | 102 | 83.7 | 4.43 | 9.70 | K0.5V+DA3 | NV P | 041516.32-073910.3 |
| 04153-0739 | STF 518 | A,BC | 2019 | 106 | 102 | 82.7 | 4.43 | 9.31 | K0.5V+DA3 | NV P | 041516.32-073910.3 |
If you need more information about this double, apply for a data request form to the WDS.
WDS 04153-0739 STF 518 A,BC (Keid) : VISUAL OBSERVATIONS REPORTS
WDS 04153-0739 STF 518 A,BC (Keid) : MEASURES
Records found: 1
| Show | date | username | difficulty | sep | sep_sigma | pa | pa_sigma | delta_mag | # | notes |
| Show | 20/01/06 | Zeitgenosse | 82.90 | 101.90 | 1 | astrometric from individual coordinates in RA, DE |
WDS 04153-0739 (Keid) : VIRTUAL EYEPIECE
|
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
WDS 04153-0739 (Keid) : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.
Not valid ID.
Error -27220
Not valid ID.