cloud inferred from the extinction of background starlight". Nature. 409 (6817): 159–161. Bibcode:2001Natur.409..159A. doi:10.1038/35051509. PMID 11196632...
48 KB (4,379 words) - 03:47, 10 October 2024
ISBN 978-0-691-23332-1. Seigar, M.S. (2017). Spiral structure in galaxies. San Rafael California: IOP Publishing. ISBN 978-1-6817-4609-8. OCLC 994877317...
50 KB (5,491 words) - 02:09, 2 September 2024
M94 Group (redirect from NGC 4736 Group)
created from the Nearby Optical Galaxy sample of Giuricin et al. Additionally, NGC 4105 and DDO 169 are frequently but not consistently identified as members...
7 KB (528 words) - 20:25, 15 August 2024
The Little Gem Nebula or NGC 6818 is a planetary nebula located in the constellation of Sagittarius. It has magnitude 10 and oval diameter of 15 to 22...
3 KB (266 words) - 18:38, 18 January 2024
NGC 6509 is a spiral galaxy in the equatorial constellation of Ophiuchus. It was discovered on July 20, 1879 by the French astronomer Édouard Stephan...
6 KB (381 words) - 17:11, 28 August 2024
NGC 6782 is a barred spiral galaxy located in the southern constellation of Pavo, at a distance of approximately 173 megalight-years from the Milky Way...
7 KB (532 words) - 19:23, 13 April 2024
"et al."(2006) The Araucaria Project: Distance to the Local Group Galaxy NGC 3109 from Near-Infrared Photometry of Cepheids see [3] Archived 2020-02-01...
137 KB (6,922 words) - 16:36, 26 October 2024
observations using the Navy Precision Optical Interferometer. The secondary star is 1.8 magnitudes (at 700 nm) fainter than the primary star and was detected at...
15 KB (1,387 words) - 19:04, 26 October 2024
LAMOST 1 is a star cluster in the constellation Draco. It has been disrupted and consists of a comoving star-stream with about 25,000 stars. The stars...
2 KB (136 words) - 23:59, 2 December 2023
it difficult to observe. "PGC 39058". NASA/IPAC Extragalactic Database. "NGC 672". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26...
2 KB (63 words) - 14:28, 12 November 2023
Lambda Draconis (redirect from 1 Draconis)
irregular variable with a periodicity of roughly 1,100 days. It has an estimated 1.53 times the mass of the Sun and a measured radius of 70 times the radius...
14 KB (878 words) - 23:13, 25 October 2024
monitoring at radio and X-ray wavelengths indicated that after roughly 600 days (1.5 years), the relativistic jet shut off. This time likely corresponds with...
12 KB (1,378 words) - 15:42, 3 November 2024
dating back to 1895, and they suggest that this objects magnitude can vary by ±1.5. "3C 371". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved...
4 KB (264 words) - 10:31, 20 January 2024
to the Big Bang and Beyond. IOP Publishing. doi:10.1088/978-1-6817-4100-0ch4. ISBN 978-1-68174-100-0. Archived from the original on June 5, 2018. Retrieved...
158 KB (16,505 words) - 05:22, 3 November 2024
Seyfert 1 galaxy which is an X-ray source. "NASA/IPAC Extragalactic Database". Results for 3C 390.3. Retrieved 2006-10-26. "3CR 390.3 -- Seyfert 1 Galaxy"...
2 KB (54 words) - 14:47, 18 December 2023
Variable TW AG BY CL CM CX DO V581 HR 3751 4126 4934 5811 6237 6618 (Alruba) 6817 7137 7783 HD 101364 156279 158259 176693 191939 Other 2MASS 1237+6526 2MASS...
2 KB (48 words) - 18:56, 5 July 2023
Draco. It is located at a distance of 300 Mpc h−1 on a side of a void of diameter of about 130 Mpc h−1. The near side of the void is bordered by the Ursa...
4 KB (299 words) - 17:25, 18 September 2023
Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by: 2 ⋅ R ∗ = ( 240 ⋅ 2.61...
8 KB (528 words) - 19:23, 22 August 2024
velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1): 1, Bibcode:1970CoAsi.239....1B. "rho Dra". SIMBAD. Centre de données astronomiques...
7 KB (535 words) - 22:52, 22 August 2024
proper names for stars. The WGSN approved the name Alruba for this star on 1 June 2018 and it is now so entered on the List of IAU-approved Star Names...
9 KB (691 words) - 07:08, 21 September 2024
an underestimate with log ( Δ M B H / M ⊙ ) ≥ 1 {\displaystyle \log(\Delta M_{BH}/M_{\odot })\geq 1} . Kolman et al (1991) and Shapovalova (2016) independently...
4 KB (567 words) - 12:55, 29 October 2024
Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by: 2 ⋅ R ∗ = ( 70.2 ⋅ 0.427...
9 KB (670 words) - 01:36, 23 August 2024
radio galaxies". Monthly Notices of the Royal Astronomical Society. 317 (1): 120–140. Bibcode:2000MNRAS.317..120R. doi:10.1046/j.1365-8711.2000.03684...
3 KB (265 words) - 03:12, 18 July 2024
shows under-abundances of carbon and oxygen in its spectrum. The star has 1.25 times the mass of the Sun and is an estimated 6.48 billion years old. It...
7 KB (502 words) - 03:49, 17 July 2024
projected rotational velocity of 120 km/s. The star has 1.56 times the mass of the Sun and 1.50 times the Sun's radius. It is radiating 5.75 times the...
9 KB (755 words) - 19:26, 22 August 2024
Variable TW AG BY CL CM CX DO V581 HR 3751 4126 4934 5811 6237 6618 (Alruba) 6817 7137 7783 HD 101364 156279 158259 176693 191939 Other 2MASS 1237+6526 2MASS...
3 KB (318 words) - 00:01, 6 January 2024
is 1.69±0.02 mas. At the estimated distance of Upsilon Draconis, this yields a physical size of about 19 times the Sun's radius. It is about 1.37 billion...
9 KB (672 words) - 10:01, 28 November 2023
Variable TW AG BY CL CM CX DO V581 HR 3751 4126 4934 5811 6237 6618 (Alruba) 6817 7137 7783 HD 101364 156279 158259 176693 191939 Other 2MASS 1237+6526 2MASS...
7 KB (576 words) - 01:03, 23 August 2024