20421+4532 BKO 157
20h 42m 05.19s +45° 32' 15.6" P.A. 240.00 sep 8.9 mag 14.10,14.80
| Coord 2000 | 20421+4532 | Discov num | BKO 157 | Comp | Coord arcsec 2000 | 20 42 05.19 +45 32 15.6 | |||||
| Date first | 1998 | Date last | 2015 | Obs | 7 | ||||||
| Pa first | 240 | Pa last | 240.3 | P.A. Now (θ) | 240.3° | ||||||
| Sep first | 8.9 | Sep last | 8.855 | Sep. Now (ρ) | 8.855" | ||||||
| Mag pri | 14.10 | Mag sec | 14.80 | delta mag (ΔM) | 0.7 | Spectral class | |||||
| Pri motion ra | +018 | Sec motion ra | +022 | ||||||||
| Pri motion dec | +008 | Sec motion dec | +008 | ||||||||
| Notes | |||||||||||
OTHER CATALOGS AND DESIGNATIONS
| Constellation | Cygnus | Gaia DR2 | 2070418092043110144 |
WDS 20421+4532 BKO 157 : NOTES
REFERENCES
| refcode | metd | author | reference |
| Bko2002 | C - | Ladanyi, T. & Berko, E. | ................... |
| Bko2002 | Webb Soc., Double Star Circ. 10, 2002 | ||
| Bko2003 | C u | Ladanyi, T., Berko, E. & Vaskuti, G | ................... |
| Bko2003 | Webb Soc., Double Star Circ. 11, 2003 | ||
| Bko2004 | C u | Berko, E., Ladanyi, T. & Vaskuti, G | ................... |
| Bko2004 | Webb Soc., Double Star Circ. 12, 2004 | ||
| Bko2005 | C u | Berko, E., Ladanyi, T. & Vaskuti, G | ................... |
| Bko2005 | Webb Soc., Double Star Circ. 13, 2005 | ||
| Bko2008 | C u | Berko, E. & Vaskuti, G. | ................... |
| Bko2008 | Webb Soc., Double Star Circ. 16, 2008 | ||
| Bko2008b | C u | Berko, E. | 2008JDSO....4..144B |
| Bko2008b | JDSO 4, 144, 2008 | ||
| Bko2009 | C u | Berko, E. | 2009JDSO....5...49B |
| Bko2009 | JDSO 5, 49, 2009 | ||
| Bko2009b | C u | Berko, E. | 2009JDSO....5..168B |
| Bko2009b | JDSO 5, 168, 2009 | ||
| Bko2009c | C u | Berko, E. | ................... |
| Bko2009c | Webb Soc., Double Star Circ. 17, 2009 | ||
| Bko2009d | C u | Berko, E. | 2009JDSO....5..189B |
| Bko2009d | JDSO 5, 189, 2009 | ||
| Bko2010a | C u | Berko, E. | 2010JDSO....6...21B |
| Bko2010a | JDSO 6, 21, 2010 | ||
| Bko2010b | C u | Berko, E. | ................... |
| Bko2010b | Webb Soc., Double Star Circ. 18, 2010 | ||
| Bko2011a | C u | Berko, E. | 2011JDSO....7....2B |
| Bko2011a | JDSO 7, 2, 2011 | ||
| Bko2011b | C u | Berko, E. | ................... |
| Bko2011b | Webb Soc., Double Star Circ. 19, 29, 2011 (BKO 898 - BKO 980) | ||
| Bko2011c | C u | Berko, E. | ................... |
| Bko2011c | Webb Soc., Double Star Circ. 19, 42, 2011 (BKO 981 - BKO1042) | ||
| Bko2012 | C u | Berko, E. | ................... |
| Bko2012 | Webb Soc., Double Star Circ. 20, 2012 |
WDS HISTORIC DATA
| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 20421+4532 | BKO 157 | 2003 | 2 | 240 | 8.8 | 12.40 | 13.70 | D | 204205.25+453215.7 | ||
| 20421+4532 | BKO 157 | 2015 | 4 | 240 | 8.9 | 14.10 | 14.80 | 204205.19+453215.6 |
If you need more information about this double, apply for a data request form to the WDS.
WDS 20421+4532 BKO 157 : VISUAL OBSERVATIONS REPORTS
WDS 20421+4532 BKO 157 : MEASURES
WDS 20421+4532 : VIRTUAL EYEPIECE
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WDS 20421+4532 : 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.