NGC 3621 - Misplaced Pages

Spiral galaxy in the constellation Hydra

NGC 3621
NGC 3621 taken by the Wide Field Imager (WFI) at ESO's La Silla Observatory
Observation data (J2000 epoch)
Constellation	Hydra
Right ascension	11 18 16.5109
Declination	–32° 48′ 49.732″
Redshift	0.002403
Heliocentric radial velocity	720 ± 0 km/s
Distance	21.7 million light years (6.64 Mpc)
Apparent magnitude (V)	9.56
Characteristics
Type	SA(s)d
Mass	2 × 10 `M`_☉
Size	~216,900 ly (66.49 kpc) (estimated)
Apparent size (V)	10.96′ × 4.79′
Other designations
ESO 377- G 037, IRAS 11158-3232, UGCA 232, MCG -05-27-008, PGC 34554

NGC 3621 is a field spiral galaxy about 22 Mly (6.7 Mpc) away in the equatorial constellation of Hydra. It was discovered by German-British astronomer William Herschel on 17 February 1790.

NGC 3621 is comparatively bright and can be well seen in moderate-sized telescopes. The galaxy is around 216,900 ly (66,500 pc) across and is inclined at an angle of 66° from being viewed face on. It shines with a luminosity equal to 13 billion times that of the Sun. The morphological classification is SA(s)d, which indicates this is an ordinary spiral with loosely wound arms. There is no evidence for a bulge. Although it appears to be isolated, NGC 3621 belongs to the Leo spur.

This galaxy has an active nucleus that matches a Seyfert 2 optical spectrum, suggesting that a low mass supermassive black hole is present at the core. Based upon the motion of stars in the nucleus, this object may have a mass of up to three million times the mass of the Sun.

Supernova

One supernova has been observed in NGC 3621: SN 2024ggi (type II, mag. 18.915) was discovered by ATLAS on 11 April 2024, and by 16 April it had brightened to magnitude 12. It got as bright as magnitude 11.9, making it the brightest supernova of 2024. It was the closest supernova to Earth since SN 2023ixf, which had been discovered on 19 May 2023. A search of archival Hubble Space Telescope and Spitzer Space Telescope images showed the suspected progenitor star, identified as a red supergiant.

Gallery

Part of NGC 3621 imaged by HST.
Very Large Telescope image of NGC 3621.
NGC 3621 by Hubble Space Telescope
NGC 3621 by GALEX
Spitzer Space Telescope image of NGC 3621.
NGC 3621 (HST)

References

^ "Results for object NGC 3621". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 5 December 2024.
^ Tully, R. Brent; et al. (March 2008), "Our Peculiar Motion Away from the Local Void", The Astrophysical Journal, 676 (1): 184–205, arXiv:0705.4139, Bibcode:2008ApJ...676..184T, doi:10.1086/527428, S2CID 14738309.
^ "NGC 3621". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-24.
^ Bresolin, Fabio; Kennicutt, Robert C.; Ryan-Weber, Emma (May 2012), "Gas Metallicities in the Extended Disks of NGC 1512 and NGC 3621. Chemical Signatures of Metal Mixing or Enriched Gas Accretion?", The Astronomical Journal, 750 (2): 122, arXiv:1203.0956, Bibcode:2012ApJ...750..122B, doi:10.1088/0004-637X/750/2/122, S2CID 118616035.
Materne, J. (April 1979). "The structure of nearby groups of galaxies - Quantitative membership probabilities". Astronomy and Astrophysics. 74 (2): 235–243. Bibcode:1979A&A....74..235M.
Seligman, Courtney. "New General Catalogue Objects: NGC 3621". Celestial Atlas. Retrieved 5 December 2024.
Lang, Philipp (July 2020), "PHANGS CO Kinematics: Disk Orientations and Rotation Curves at 150 pc Resolution", The Astrophysical Journal, 897 (2): 122, arXiv:2005.11709, Bibcode:2020ApJ...897..122L, doi:10.3847/1538-4357/ab9953.
^ O'Meara, Stephen James (2013), Deep-Sky Companions: Southern Gems, Cambridge University Press, p. 203, Bibcode:2013dcsg.book.....O, ISBN 978-1107015012.
^ Buta, Ronald J.; Corwin, Harold G.; Odewahn, Stephen C. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 978-0521820486.
^ Barth, Aaron J.; Strigari, Louis E.; Bentz, Misty C.; Greene, Jenny E.; Ho, Luis C. (January 2009), "Dynamical Constraints on the Masses of the Nuclear Star Cluster and Black Hole in the Late-Type Spiral Galaxy NGC 3621", The Astronomical Journal, 690 (1): 1031–1044, arXiv:0809.1066, Bibcode:2009ApJ...690.1031B, doi:10.1088/0004-637X/690/1/1031, S2CID 12574940.
"SN 2024ggi". Transient Name Server. IAU. Retrieved 4 December 2024.
Bishop, David. "Bright Supernovae - 2024". Rochester Astronomy. Retrieved 31 December 2024.
Xiang, Danfeng; Mo, Jun; Wang, Xiaofeng; Wang, Lingzhi; Zhang, Jujia; Lin, Han; Chen, Liyang; Song, Cuiying; Liu, Liang-Duan; Wang, Zhenyu; Li, Gaici (2024). "The Red Supergiant Progenitor of Type II Supernova 2024ggi". The Astrophysical Journal. 969 (1): L15. arXiv:2405.07699. Bibcode:2024ApJ...969L..15X. doi:10.3847/2041-8213/ad54b3.
"A special spiral galaxy for over 200 000 Facebook fans". Hubble Space Telescope – Picture of the Week. Retrieved 23 January 2020.
"A galaxy full of surprises — NGC 3621 is bulgeless but has three central black holes". European Southern Observatory – Picture of the Week. Retrieved 23 January 2020.

External links

A Picture-perfect Pure-disc Galaxy — ESO Photo release.

v t e Astronomical catalogs
NGC	NGC 3616 NGC 3617 NGC 3618 NGC 3619 NGC 3620 NGC 3621 NGC 3622 NGC 3623 NGC 3624 NGC 3625 NGC 3626

v t e New General Catalogue 3500 to 3999
3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999
Astronomical catalog List of NGC objects 3001–4000

New General Catalogue 3500 to 3999

Constellation of Hydra

Stars

Bayer	α (Alphard) β γ δ ε (Ashlesha) ζ η θ ι (Ukdah) κ λ μ ν ξ ο π ρ σ (Minchir) τ τ υ (Zhang) υ φ φ φ χ χ ψ ω
Flamsteed	1 2 3 6 (a) 9 10 12 (D) 14 15 17 19 20 21 23 24 25 26 27 (P) 28 29 33 (A) 34 37 44 47 48 50 51 (k) 52 (l) 54 (m) 55 56 57 58 (E) 59 60 3 Crt (b) 5 Crt (b) 6 Crt (b) 10 Crt 17 Crt (N) 20 Crt 14 Lib 30 Mon (C) 31 Mon (F) 2 Sex
Variable	R U V W TW EX HS KU LQ V419 V421 V434 V478
HR	3378 3538 3749 (G) 3750 3858 (I) 3862 3919 3923 (Felis) 4162 4328 4339 4445 5265
HD	72659 74156 82943 86226 86264 90156
Gliese	328 357 433 453 3517 3634
Other	HE 1256-2738 HE 1327-2326 LHS 2065 LHS 3003 LTT 3780 2MASS 1114−2618 WASP-25 WASP-36 WASP-84 WISE 0855−0714

Star clusters

Open	Messier 48
Globular	Messier 68 NGC 5694

Nebulae

Planetary	Abell 33 Abell 35 NGC 3242

Galaxies

Messier	83
NGC	2617 2835 2865 2890 2936 2937 2992 3054 3081 3109 3285 3305 3307 3308 3309 3311 3312 3313 3314 3315 3316 3336 3369 3393 3402 3464 3585 3621 3717 3923 4980 4993 5078 5101 5135 5260 5264 5495
Other	3C 196.1 AM 1316-241 Arp 7 ESO 510-G13 GAMA202627 IC 535 MRC 1138-262 Peekaboo Galaxy TN J0924-2201 Tololo 1247-232

Galaxy clusters

Abell	754 3411 3412
Other	Hickson 40

Astronomical events

GW170817

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Categories:

Supernova

Gallery

See also

References

External links