20531+2909 STT 417 AB,C
20h 53m 04.23s +29° 08' 43.7" P.A. 108.00 sep 30.8 mag 8.24,10.50 Sp A0 dist. 204.92 pc (668.45 l.y.)
| Coord 2000 | 20531+2909 | Discov num | STT 417 | Comp | AB,C | Coord arcsec 2000 | 20 53 04.23 +29 08 43.7 | ||||
| Date first | 1843 | Date last | 2014 | Obs | 27 | ||||||
| Pa first | 110 | Pa last | 108.1 | P.A. Now (θ) | 108.1° | ||||||
| Sep first | 31.5 | Sep last | 30.797 | Sep. Now (ρ) | 30.797" | ||||||
| Mag pri | 8.24 | Mag sec | 10.50 | delta mag (ΔM) | 2.26 | Spectral class | A0 (white) | ||||
| Pri motion ra | +012 | Sec motion ra | +016 | ||||||||
| Pri motion dec | -005 | Sec motion dec | -002 | ||||||||
| Notes | |||||||||||
20531+2909 SYSTEM COMPONENTS
| Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
| Show | HD 198977 | 89240 | 20 53 04 +29 08 44 | STT 417 AB | 2018 | 88 | 27 | 0.9 | 8.24 | 8.42 | 0.18 | ||
| Show | 89240 | 20 53 04 +29 08 44 | STT 417 AB,C | 2014 | 27 | 108 | 30.8 | 8.24 | 10.50 | 2.26 | <=== |
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation | Vulpecula | SAO | 89240 | HIP | 103074 | Tycho2 | 2183-00600-1 | ||||
| Gaia DR2 | 1858371777068435200 | HD | 198977 | BD | BD+28 3916 | Distance | 204.92 | ||||
| Distance ly | 668.45 |
WDS 20531+2909 STT 417 AB,C : NOTES
REFERENCES
| refcode | metd | author | reference |
| STTA | (O. Struve DD - Appendix list) | ................... | |
| Stt1864 | Ma - | Struve, O. | 1864MNRAS..24..149S |
| Stt1864 | MNRAS 24, 149, 1864 | ||
| Stt1866 | orb - | Struve, O. | . |
| Stt1866 | Bull. Imp. Acad. Sci. St. Petersburg, 1866 | ||
| Stt1874 | orb - | Struve, O. | . |
| Stt1874 | Compte Rendus 79, 1467, 1874 | ||
| Stt1875 | orb - | Struve, O. | 1875MNRAS..35..367S |
| Stt1875 | MNRAS 35, 367, 1875 | ||
| Stt1878 | Ma - | Struve, O. | 1878ObPul...9....1S |
| Stt1878 | Pulkova Observations 9, 1, 1878 | ||
| Stt1879A | Ma - | Struve, O. | 1879Obs.....2..304G |
| Stt1879A | cited by Gledhill (Obs 2, 304, 1879) | ||
| Stt1879B | Ma - | Struve, O. | 1879Obs.....3..245G |
| Stt1879B | cited by Gledhill (Obs 3, 245, 1879) | ||
| Stt1879C | Ma - | Struve, O. | 1879Obs.....2..344G |
| Stt1879C | cited by Gledhill (Obs 2, 344, 1879) | ||
| Stt1880A | Ma - | Struve, O. | 1880Obs.....2..605H |
| Stt1880A | cited by Hunt (Obs. 3, 605, 1880) | ||
| Stt1880B | Ma - | Struve, O. | 1880Obs.....3..535G |
| Stt1880B | cited by Gledhill (Obs 3, 535, 1880) | ||
| Stt1880C | Ma - | Struve, O. | 1880MNRAS..40..497B |
| Stt1880C | cited by Burnham (MNRAS 40, 497, 1880) | ||
| Stt1884A | Ma - | Struve, O. | 1884AReg...22..216S |
| Stt1884A | cited by Sadler (Astr. Register 22, 216, 1884) | ||
| Stt1893a | Ma j | Struve, O. | 1893ObPul..10....1S |
| Stt1893a | Pulkova Obs. Observations 10, 1, 1893 | ||
| Stt1906A | Ma - | Struve, O. | 1906MmRAS..56....1L |
| Stt1906A | cited by Lewis (MemRAS 56, 1, 1906) | ||
| Stt1906B | Ma j | Struve, O. | 1906QB821.B972..... |
| Stt1906B | cited in BDS (Burnham Double Star Cat., 1906) | ||
| Stt1908A | Ma - | Struve, O. | 1908MNRAS..68..465B |
| Stt1908A | cited by Barnard (MNRAS 68, 465, 1908) | ||
| Stt1913A | Ma - | Struve, O. | 1913QB811.B8....... |
| Stt1913A | cited by Burnham (Carnegie Inst. Wash. #168, 1913) | ||
| Stt1914A | Ma - | Struve, O. | 1914AN....198..107R |
| Stt1914A | cited by Rabe (AN 198, 107, 1914) | ||
| Stt1932A | Ma - | Struve, O. | 1932QB821.A43...... |
| Stt1932A | cited in ADS (Aitken Double Star Cat., 1932) |
WDS HISTORIC DATA
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 20531+2909 | STT 417 | AB,C | 2009 | 23 | 108 | 30.6 | 8.24 | 10.50 | D | 205304.23+290843.7 | |
| 20531+2909 | STT 417 | AB,C | 2014 | 27 | 108 | 30.8 | 8.24 | 10.50 | A0 | 205304.23+290843.7 |
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WDS 20531+2909 STT 417 AB,C : VISUAL OBSERVATIONS REPORTS
WDS 20531+2909 STT 417 AB,C : MEASURES
WDS 20531+2909 : VIRTUAL EYEPIECE
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WDS 20531+2909 : ALADIN DSS IMAGE @
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