20391+1005 STT 533 AC
20h 39m 07.78s +10° 05' 10.3" P.A. 101.00 sep 214.6 mag 5.15,8.62 Sp G1IV dist. 28.65 pc (93.46 l.y.)
| Coord 2000 | 20391+1005 | Discov num | STT 533 | Comp | AC | Coord arcsec 2000 | 20 39 07.78 +10 05 10.3 | ||||
| Date first | 1852 | Date last | 2015 | Obs | 24 | ||||||
| Pa first | 101 | Pa last | 100.8 | P.A. Now (θ) | 100.8° | ||||||
| Sep first | 213.8 | Sep last | 214.574 | Sep. Now (ρ) | 214.574" | ||||||
| Mag pri | 5.15 | Mag sec | 8.62 | delta mag (ΔM) | 3.47 | Spectral class | G1IV (yellow) | ||||
| Pri motion ra | +324 | Sec motion ra | +315 | ||||||||
| Pri motion dec | +022 | Sec motion dec | +026 | ||||||||
| Notes | N V (See Notes, Proper motion indicates physical) | ||||||||||
20391+1005 SYSTEM COMPONENTS
| Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
| Show | Kap Del | 126059 | 20 39 08 +10 05 10 | STT 533 AB | 2020 | 35 | 278 | 46.3 | 5.15 | 11.63 | 6.48 | ||
| Show | 126059 | 20 39 08 +10 05 10 | STT 533 AC | 2015 | 24 | 101 | 214.6 | 5.15 | 8.62 | 3.47 | <=== |
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation | Delphinus | SAO | 126059 | HIP | 101932 | Tycho2 | 1092-01776-1 | ||||
| HD | 196794 | HR | 7896 | GC | 28765 | ADS | 14101 | ||||
| BD | BD+09 4602 | Bayer | Kappa Delphini | Bayer name | Kap Del | Flamsteed | 7 Delphini | ||||
| Flamsteed name | 7 Del | FK5 | 772 | Distance | 28.65 | Distance ly | 93.46 | ||||
| Bayer greek | κ Del |
WDS 20391+1005 STT 533 AC : NOTES
| discov_num | notes | refcode |
| STT 533 | kap Del = 7 Del. AC = LDS1044. | |
| AB: Optical pair, based on study of relative motion of the components | ||
| using the method of apparent motion parameters. | Kiy2008 | |
| AC: SHY 334. Bayesian analysis by Shaya & Olling (2011) indicates very | Shy2011 | |
| high (near 100%) probability pair is physical. | ||
| kap Del | Gontcharov & Kiyaeva (2010 detect variation in Hipparcos data which | |
| they conclude is due to an unseen companion, orbiting the primary with | ||
| a period of 45 +/- 5 years. The companion is >4 mag fainter than the | ||
| primary; spectral type estimated as WD or RD, mass 0.4 +/- 0.3 Msun. | Gon2010 |
REFERENCES
| refcode | metd | author | reference |
| Gon2010 | orb - | Gontcharov, G.A. & Kiyaeva, O.V. | 2010NewA...15..324G |
| Gon2010 | New Astron. 15, 324, 2010 | ||
| Kiy2008 | - | Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. | 2008SvAL...32..405K |
| Kiy2008 | SvAL 34, 405, 2008 | ||
| Shy2011 | - | Shaya, E.J. & Olling, R. | 2011ApJS..192....2S |
| Shy2011 | ApJS 192, 2, 2011 | ||
| Shy2011 | (Statistical analysis of probability that wide Hipparcos pairs are physical. Pairs | ||
| Shy2011 | added to WDS only if probability 90% or greater.) |
DISCOVERER
| idgroup | discov | author |
| 1 | STT | Struve, O. |
WDS HISTORIC DATA
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 20391+1005 | STT 533 | AC | 2001 | 19 | 100 | 215.9 | 5.15 | 8.62 | G1IV | N DV | 203907.59+100510.1 |
| 20391+1005 | STT 533 | AC | 2011 | 20 | 100 | 212.3 | 5.15 | 8.62 | G1IV | NVD | 203907.59+100510.1 |
| 20391+1005 | STT 533 | AC | 2015 | 24 | 101 | 214.6 | 5.15 | 8.62 | G1IV | NV | 203907.59+100510.1 |
If you need more information about this double, apply for a data request form to the WDS.
WDS 20391+1005 STT 533 AC : VISUAL OBSERVATIONS REPORTS
WDS 20391+1005 STT 533 AC : MEASURES
WDS 20391+1005 : VIRTUAL EYEPIECE
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WDS 20391+1005 : ALADIN DSS IMAGE @
Error -22130
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