NGC 6752

NGC 6752
NGC 6752 by Hubble Space Telescope; 3.5′ view Credit: NASA/STScI/WikiSky
Observation data (J2000 epoch)
Class	VI^[1]
Constellation	Pavo
Right ascension	19^h 10^m 52.11^s^[2]
Declination	–59° 59′ 04.4″^[2]
Distance	13.0 kly (4.0 kpc)^[3]
Apparent magnitude (V)	5.4 ^[4]
Apparent dimensions (V)	20.4′
Physical characteristics
Mass	7005140000000000000♠1.4×10⁵^[5] M_☉
V_HB	13.7
Metallicity	${\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}$ = –1.24^[6] dex
Estimated age	11.78 Gyr^[6]
Other designations	Caldwell 93

NGC 6752 is a globular cluster in the constellation Pavo.^[7] It is the third-brightest in the sky, after Omega Centauri and 47 Tucanae,^[8] and is best seen from June to October in the Northern Hemisphere.^[9]

NGC 6752 was first identified by one James Dunlop of Parramatta on 30 June 1826, who described it as an irregular bright nebula which could be resolved into a cluster of many stars, highly compressed at the centre. This corresponds with a core region densely populated with stars around 1.3 light-years in diameter, which indicates it has undergone core collapse. The cluster lies around 13,000 light-years distant and is one of the closer globular clusters to Earth. It also lies 17,000 light-years away from the galactic centre.^[7] It belongs to Shapley–Sawyer Concentration Class VI, namely of intermediate density,^[1] and has been calculated to be 11.78 billion years old.^[6] There are a large number of binary stars in the system, as well as blue stragglers, which are likely to have been formed by collisions and mergers of smaller stars. The NASA website "Astronomy Picture of the Day" notes that it holds over 100,000 stars in a sphere about 100 light-years in diameter.^[8]

The apparent magnitude of the cluster is 5.4, so it can be seen with the unaided eye.^[7] However this depends on good viewing conditions with a minimum of light pollution.^[9] With binoculars it can be seen to cover an area three quarters the size of the full moon. It lies 1.5 degrees east of 5th-magnitude Omega Pavonis.^[7] The nearest bright star is Peacock, which lies 3.25 degrees north and 9.25 degrees east.^[9]

Six X-ray sources have been identified in the cluster's core by the Chandra X-Ray Observatory.^[9]

Gallery

NGC 6752 taken by the Wide Field Imager on the MPG/ESO 2.2-meter telescope.^[1]
Map showing location of NGC 6752

^ "Low Sodium Diet Key to Old Age for Stars". ESO Press Release. Retrieved 30 May 2013.

References

1 2 Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin (849): 11–14, Bibcode:1927BHarO.849...11S.
1 2 Goldsbury, Ryan; et al. (December 2010), "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters", The Astronomical Journal, 140 (6): 1830–1837, arXiv:1008.2755, Bibcode:2010AJ....140.1830G, doi:10.1088/0004-6256/140/6/1830.
↑ Boyles, J.; et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal, 742 (1): 51, arXiv:1108.4402, Bibcode:2011ApJ...742...51B, doi:10.1088/0004-637X/742/1/51.
↑ "SIMBAD Astronomical Database". Results for NGC 6752. Retrieved 2007-04-21.
↑ Marks, Michael; Kroupa, Pavel (August 2010), "Initial conditions for globular clusters and assembly of the old globular cluster population of the Milky Way", Monthly Notices of the Royal Astronomical Society, 406 (3): 2000–2012, arXiv:1004.2255, Bibcode:2010MNRAS.406.2000M, doi:10.1111/j.1365-2966.2010.16813.x. Mass is from M_PD on Table 1.
1 2 3 Forbes, Duncan A.; Bridges, Terry (May 2010), "Accreted versus in situ Milky Way globular clusters", Monthly Notices of the Royal Astronomical Society, 404 (3): 1203–1214, arXiv:1001.4289, Bibcode:2010MNRAS.404.1203F, doi:10.1111/j.1365-2966.2010.16373.x.
1 2 3 4 O'Meara, Stephen James (2013). Deep-Sky Companions: Southern Gems. Cambridge University Press. pp. 410–12. ISBN 1107015014.
1 2 Nemiroff, R.; Bonnell, J., eds. (5 July 2013). "Globular Star Cluster NGC 6752". Astronomy Picture of the Day. NASA. Retrieved 20 August 2013.
1 2 3 4 Mobberley, Martin (1999). The Caldwell Objects And How to Observe Them. Springer. pp. 194–95. ISBN 978-1-4419-0326-6.

External links

NGC 6752 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
http://seds.org/

Coordinates: 19^h 10^m 51.8^s, −59° 58′ 54.7″

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

Book:Caldwell catalogue Category:Caldwell objects Portal:Astronomy Commons:Caldwell objects

New General Catalogue 6500 to 6999

NGC 6500 NGC 6501 NGC 6502 NGC 6503 NGC 6504 NGC 6505 NGC 6506 NGC 6507 NGC 6508 NGC 6509 NGC 6510 NGC 6511 NGC 6512 NGC 6513 NGC 6514 NGC 6515 NGC 6516 NGC 6517 NGC 6518 NGC 6519 NGC 6520 NGC 6521 NGC 6522 NGC 6523 NGC 6524 NGC 6525 NGC 6526 NGC 6527 NGC 6528 NGC 6529 NGC 6530 NGC 6531 NGC 6532 NGC 6533 NGC 6534 NGC 6535 NGC 6536 NGC 6537 NGC 6538 NGC 6539 NGC 6540 NGC 6541 NGC 6542 NGC 6543 NGC 6544 NGC 6545 NGC 6546 NGC 6547 NGC 6548 NGC 6549 NGC 6550 NGC 6551 NGC 6552 NGC 6553 NGC 6554 NGC 6555 NGC 6556 NGC 6557 NGC 6558 NGC 6559 NGC 6560 NGC 6561 NGC 6562 NGC 6563 NGC 6564 NGC 6565 NGC 6566 NGC 6567 NGC 6568 NGC 6569 NGC 6570 NGC 6571 NGC 6572 NGC 6573 NGC 6574 NGC 6575 NGC 6576 NGC 6577 NGC 6578 NGC 6579 NGC 6580 NGC 6581 NGC 6582 NGC 6583 NGC 6584 NGC 6585 NGC 6586 NGC 6587 NGC 6588 NGC 6589 NGC 6590 NGC 6591 NGC 6592 NGC 6593 NGC 6594 NGC 6595 NGC 6596 NGC 6597 NGC 6598 NGC 6599 NGC 6600 NGC 6601 NGC 6602 NGC 6603 NGC 6604 NGC 6605 NGC 6606 NGC 6607 NGC 6608 NGC 6609 NGC 6610 NGC 6611 NGC 6612 NGC 6613 NGC 6614 NGC 6615 NGC 6616 NGC 6617 NGC 6618 NGC 6619 NGC 6620 NGC 6621 NGC 6622 NGC 6623 NGC 6624 NGC 6625 NGC 6626 NGC 6627 NGC 6628 NGC 6629 NGC 6630 NGC 6631 NGC 6632 NGC 6633 NGC 6634 NGC 6635 NGC 6636 NGC 6637 NGC 6638 NGC 6639 NGC 6640 NGC 6641 NGC 6642 NGC 6643 NGC 6644 NGC 6645 NGC 6646 NGC 6647 NGC 6648 NGC 6649 NGC 6650 NGC 6651 NGC 6652 NGC 6653 NGC 6654 NGC 6655 NGC 6656 NGC 6657 NGC 6658 NGC 6659 NGC 6660 NGC 6661 NGC 6662 NGC 6663 NGC 6664 NGC 6665 NGC 6666 NGC 6667 NGC 6668 NGC 6669 NGC 6670 NGC 6671 NGC 6672 NGC 6673 NGC 6674 NGC 6675 NGC 6676 NGC 6677 NGC 6678 NGC 6679 NGC 6680 NGC 6681 NGC 6682 NGC 6683 NGC 6684 NGC 6685 NGC 6686 NGC 6687 NGC 6688 NGC 6689 NGC 6690 NGC 6691 NGC 6692 NGC 6693 NGC 6694 NGC 6695 NGC 6696 NGC 6697 NGC 6698 NGC 6699 NGC 6700 NGC 6701 NGC 6702 NGC 6703 NGC 6704 NGC 6705 NGC 6706 NGC 6707 NGC 6708 NGC 6709 NGC 6710 NGC 6711 NGC 6712 NGC 6713 NGC 6714 NGC 6715 NGC 6716 NGC 6717 NGC 6718 NGC 6719 NGC 6720 NGC 6721 NGC 6722 NGC 6723 NGC 6724 NGC 6725 NGC 6726 NGC 6727 NGC 6728 NGC 6729 NGC 6730 NGC 6731 NGC 6732 NGC 6733 NGC 6734 NGC 6735 NGC 6736 NGC 6737 NGC 6738 NGC 6739 NGC 6740 NGC 6741 NGC 6742 NGC 6743 NGC 6744 NGC 6745 NGC 6746 NGC 6747 NGC 6748 NGC 6749 NGC 6750 NGC 6751 NGC 6752 NGC 6753 NGC 6754 NGC 6755 NGC 6756 NGC 6757 NGC 6758 NGC 6759 NGC 6760 NGC 6761 NGC 6762 NGC 6763 NGC 6764 NGC 6765 NGC 6766 NGC 6767 NGC 6768 NGC 6769 NGC 6770 NGC 6771 NGC 6772 NGC 6773 NGC 6774 NGC 6775 NGC 6776 NGC 6777 NGC 6778 NGC 6779 NGC 6780 NGC 6781 NGC 6782 NGC 6783 NGC 6784 NGC 6785 NGC 6786 NGC 6787 NGC 6788 NGC 6789 NGC 6790 NGC 6791 NGC 6792 NGC 6793 NGC 6794 NGC 6795 NGC 6796 NGC 6797 NGC 6798 NGC 6799 NGC 6800 NGC 6801 NGC 6802 NGC 6803 NGC 6804 NGC 6805 NGC 6806 NGC 6807 NGC 6808 NGC 6809 NGC 6810 NGC 6811 NGC 6812 NGC 6813 NGC 6814 NGC 6815 NGC 6816 NGC 6817 NGC 6818 NGC 6819 NGC 6820 NGC 6821 NGC 6822 NGC 6823 NGC 6824 NGC 6825 NGC 6826 NGC 6827 NGC 6828 NGC 6829 NGC 6830 NGC 6831 NGC 6832 NGC 6833 NGC 6834 NGC 6835 NGC 6836 NGC 6837 NGC 6838 NGC 6839 NGC 6840 NGC 6841 NGC 6842 NGC 6843 NGC 6844 NGC 6845 NGC 6846 NGC 6847 NGC 6848 NGC 6849 NGC 6850 NGC 6851 NGC 6852 NGC 6853 NGC 6854 NGC 6855 NGC 6856 NGC 6857 NGC 6858 NGC 6859 NGC 6860 NGC 6861 NGC 6862 NGC 6863 NGC 6864 NGC 6865 NGC 6866 NGC 6867 NGC 6868 NGC 6869 NGC 6870 NGC 6871 NGC 6872 NGC 6873 NGC 6874 NGC 6875 NGC 6876 NGC 6877 NGC 6878 NGC 6879 NGC 6880 NGC 6881 NGC 6882 NGC 6883 NGC 6884 NGC 6885 NGC 6886 NGC 6887 NGC 6888 NGC 6889 NGC 6890 NGC 6891 NGC 6892 NGC 6893 NGC 6894 NGC 6895 NGC 6896 NGC 6897 NGC 6898 NGC 6899 NGC 6900 NGC 6901 NGC 6902 NGC 6903 NGC 6904 NGC 6905 NGC 6906 NGC 6907 NGC 6908 NGC 6909 NGC 6910 NGC 6911 NGC 6912 NGC 6913 NGC 6914 NGC 6915 NGC 6916 NGC 6917 NGC 6918 NGC 6919 NGC 6920 NGC 6921 NGC 6922 NGC 6923 NGC 6924 NGC 6925 NGC 6926 NGC 6927 NGC 6928 NGC 6929 NGC 6930 NGC 6931 NGC 6932 NGC 6933 NGC 6934 NGC 6935 NGC 6936 NGC 6937 NGC 6938 NGC 6939 NGC 6940 NGC 6941 NGC 6942 NGC 6943 NGC 6944 NGC 6945 NGC 6946 NGC 6947 NGC 6948 NGC 6949 NGC 6950 NGC 6951 NGC 6952 NGC 6953 NGC 6954 NGC 6955 NGC 6956 NGC 6957 NGC 6958 NGC 6959 NGC 6960 NGC 6961 NGC 6962 NGC 6963 NGC 6964 NGC 6965 NGC 6966 NGC 6967 NGC 6968 NGC 6969 NGC 6970 NGC 6971 NGC 6972 NGC 6973 NGC 6974 NGC 6975 NGC 6976 NGC 6977 NGC 6978 NGC 6979 NGC 6980 NGC 6981 NGC 6982 NGC 6983 NGC 6984 NGC 6985 NGC 6986 NGC 6987 NGC 6988 NGC 6989 NGC 6990 NGC 6991 NGC 6992 NGC 6993 NGC 6994 NGC 6995 NGC 6996 NGC 6997 NGC 6998 NGC 6999

Astronomical catalog List of NGC objects

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