NGC 6826 (also known as Caldwell 15) is a planetary nebula located in the constellation Cygnus. It is commonly referred to as the "blinking planetary", although many other nebulae exhibit such "blinking". When viewed through a small telescope, the brightness of the central star overwhelms the eye when viewed directly, obscuring the surrounding nebula. However, it can be viewed well using averted vision, which causes it to "blink" in and out of view as the observer's eye wanders.
A distinctive feature of this nebula are the two bright patches on either side, which are known as Fast Low-Ionization Emission Regions, or FLIERS. They appear to be relatively young, moving outwards at supersonic speeds.[3]
Gallery
NGC 6826 "Blinking Eye".jpg
See also
List of NGC objects
Planetary nebulae
References
"NGC 6826". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2007-04-17.
"NGC 6826". Stellar Scenes Image Collection. Retrieved 2007-10-05.
"NGC 6826 : The Blinking Nebula". astroimages.org. Retrieved 2007-10-05.
External links
Wikimedia Commons has media related to NGC 6826.
"Hubble's planetary nebula gallery. A view of NGC 6826". Hubble Space Telescope.
NGC 6826 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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Caldwell catalogue
List
C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68 C69 C70 C71 C72 C73 C74 C75 C76 C77 C78 C79 C80 C81 C82 C83 C84 C85 C86 C87 C88 C89 C90 C91 C92 C93 C94 C95 C96 C97 C98 C99 C100 C101 C102 C103 C104 C105 C106 C107 C108 C109
See also
Messier Catalogue Catalogue of Nebulae and Clusters of Stars New General Catalogue Index Catalogue Revised New General Catalogue Herschel 400 Catalogue
Wikipedia book Book:Caldwell catalogue Category Category:Caldwell objects Portal Portal:Astronomy Commons page Commons:Caldwell objects
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New General Catalogue 6500 to 6999
6500 6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531 6532 6533 6534 6535 6536 6537 6538 6539 6540 6541 6542 6543 6544 6545 6546 6547 6548 6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586 6587 6588 6589 6590 6591 6592 6593 6594 6595 6596 6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610 6611 6612 6613 6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649 6650 6651 6652 6653 6654 6655 6656 6657 6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682 6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794 6795 6796 6797 6798 6799 6800 6801 6802 6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836 6837 6838 6839 6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858 6859 6860 6861 6862 6863 6864 6865 6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876 6877 6878 6879 6880 6881 6882 6883 6884 6885 6886 6887 6888 6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913 6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931 6932 6933 6934 6935 6936 6937 6938 6939 6940 6941 6942 6943 6944 6945 6946 6947 6948 6949 6950 6951 6952 6953 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994 6995 6996 6997 6998 6999
Astronomical catalog List of NGC objects
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Constellation of Cygnus
List of stars in Cygnus
Stars
Bayer
α (Deneb) β (Albireo) γ (Sadr) δ (Fawaris) ε (Aljanah) ζ η θ ι1 ι2 κ λ μ ν ξ π1 (Azelfafage) π2 ρ σ τ υ φ χ ψ ω1 ω2 P Q
Flamsteed
2 4 8 9 14 15 16 (c) 17 20 (d) 22 23 26 (e) 27 (b1) 28 (b2) 29 (b3) 30 31 32 33 35 39 41 47 52 55 56 57 59 (f1) 61 63 (f2) 68 (A) 71 (g) 72 74 75
Variable
R T W RW SS TT BC BI CH KY V404 V476 V1057 V1143 V1191 V1489 V1500 V1668 V1974 V2513
HR
7633 7767 7912 8193
HD
185269 185435 187123 188753 191806 197037
Gliese
777 806 1245
Kepler
5 6 11 15 16 17 18 22 23 27 28 29 31 32 33 34 35 36 39 40 41 42 43 44 45 47 51 56 61 66 67 68 69 70 78 80 84 86 89 107 182 186 223 371 411 419 432 451 452 560 1229 1520 1625
Other
AFGL 2591 BD+40° 4210 BD+43 3654 Cygnus OB2 #8A Cygnus OB2 #12 Cygnus X-1 Cygnus X-3 G 208-44 G 208-45 GSC 03949-00967 HAT-P-7 HAT-P-11 HAT-P-17 KELT-9 KIC 8462852 KIC 9832227 KIC 11026764 KOI-5 KOI-74 KOI-81 KOI-256 KPD 1930+2752 MWC 349 N6946-BH1 PH1 PSR J2032+4127 W75N(B)-VLA2 WASP-48 WISE J2000+3629 WR 133 WR 134 WR 135 WR 136 WR 137 WR 140 WR 142 WR 147 WR 148
Former
3
Star
clusters
Association
Cygnus OB2 Cygnus OB7 Cygnus OB9
Open
DR 6 IC 5146 Messier 29 Messier 39 NGC 6811 NGC 6819 NGC 6834 NGC 6866 NGC 6871 NGC 6910
Molecular
clouds
Cygnus X (including DR 21)
Nebulae
Dark
Barnard 146 Barnard 147 IC 5146 L1014
H II
NGC 6914 North America Nebula Pelican Nebula Sadr Region Sh2-101 Sh2-106
Planetary
Abell 78 Egg Nebula IRAS 19475+3119 Kronberger 61 M1-92 NGC 6826 NGC 6881 NGC 6884 NGC 7008 NGC 7026 NGC 7027 NGC 7048 Soap Bubble Nebula
WR
Crescent Nebula
SNR
Cygnus Loop (including Veil Nebula)
Galaxies
NGC
6801 6946 7013
Other
3C 438 Cygnus A
Hellenica World - Scientific Library
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