millisecond pulsar discovered in 1998 by the Italian-Dutch BeppoSAX satellite, SAX J1808.4−3658 revealed X-ray pulsations at the 401 Hz neutron star spin frequency...
3 KB (329 words) - 18:48, 6 May 2024
X-ray pulsar, Cen X-3 The first accreting millisecond X-ray pulsar, SAX J1808.4−3658 The first pulsar with planets, PSR B1257+12 The first pulsar observed...
64 KB (7,140 words) - 19:42, 16 October 2024
brightest X-ray burst so far observed. It came from the neutron star SAX J1808.4−3658 about 11,000 light-years from Earth in the constellation Sagittarius...
14 KB (1,351 words) - 17:25, 17 October 2024
millisecond X-ray pulsations in the persistent flux of the X-ray binary SAX J1808.4-3658. This was strong evidence for the model in which radio millisecond...
4 KB (359 words) - 15:37, 12 January 2023
with months to years between episodes of observable X-ray pulsation. SAX J1808.4-3658 is a transient, accreting millisecond X-ray pulsar that is intermittent...
20 KB (2,602 words) - 20:40, 16 May 2024
discovered the first millisecond X-ray pulsar in a binary system, SAX J1808.4-3658, a neutron star spinning around its axis more than 400 times per second...
8 KB (752 words) - 13:31, 17 June 2023
B1821−24 PSR B1857−26 PSR J1808−2024 PSR J1747−2958 PSR J1748−2446ad S2 S55 S62 S4716 SAX J1747.0−2853 SAX J1808.4−3658 SAX J1810.8−2609 SWEEPS J175853...
2 KB (230 words) - 14:06, 20 October 2024
A is a spectral type K1 bright giant which has an apparent magnitude of +4.86. It is a microvariable with a frequency of 0.43398 cycles per day and an...
9 KB (688 words) - 00:33, 17 July 2024
B1821−24 PSR B1857−26 PSR J1808−2024 PSR J1747−2958 PSR J1748−2446ad S2 S55 S62 S4716 SAX J1747.0−2853 SAX J1808.4−3658 SAX J1810.8−2609 SWEEPS J175853...
3 KB (324 words) - 01:55, 23 March 2021
B1821−24 PSR B1857−26 PSR J1808−2024 PSR J1747−2958 PSR J1748−2446ad S2 S55 S62 S4716 SAX J1747.0−2853 SAX J1808.4−3658 SAX J1810.8−2609 SWEEPS J175853...
547 bytes (75 words) - 16:15, 8 July 2017
New York: Dover Publications Inc. p. 357. ISBN 0-486-21079-0. Retrieved 4 September 2012. (in Chinese) AEEA (Activities of Exhibition and Education...
5 KB (565 words) - 01:42, 14 February 2023
zodiac constellation of Sagittarius. With an apparent visual magnitude of +4.118, it is bright enough to be viewed with the naked eye. Based upon an annual...
7 KB (559 words) - 07:51, 21 August 2024
Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book...
6 KB (368 words) - 05:08, 21 August 2024
Sagittarius. It is visible to the naked eye with an apparent visual magnitude of 4.37. Based upon an annual parallax shift of 6.29 mas as seen from Earth, this...
8 KB (541 words) - 07:08, 21 August 2024
B1821−24 PSR B1857−26 PSR J1808−2024 PSR J1747−2958 PSR J1748−2446ad S2 S55 S62 S4716 SAX J1747.0−2853 SAX J1808.4−3658 SAX J1810.8−2609 SWEEPS J175853...
8 KB (701 words) - 07:24, 21 August 2024
B1821−24 PSR B1857−26 PSR J1808−2024 PSR J1747−2958 PSR J1748−2446ad S2 S55 S62 S4716 SAX J1747.0−2853 SAX J1808.4−3658 SAX J1810.8−2609 SWEEPS J175853...
2 KB (221 words) - 21:22, 24 February 2023
B1821−24 PSR B1857−26 PSR J1808−2024 PSR J1747−2958 PSR J1748−2446ad S2 S55 S62 S4716 SAX J1747.0−2853 SAX J1808.4−3658 SAX J1810.8−2609 SWEEPS J175853...
9 KB (657 words) - 06:10, 21 August 2024
B1821−24 PSR B1857−26 PSR J1808−2024 PSR J1747−2958 PSR J1748−2446ad S2 S55 S62 S4716 SAX J1747.0−2853 SAX J1808.4−3658 SAX J1810.8−2609 SWEEPS J175853...
568 bytes (78 words) - 21:13, 7 July 2017
Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book...
8 KB (569 words) - 05:21, 21 August 2024
B1821−24 PSR B1857−26 PSR J1808−2024 PSR J1747−2958 PSR J1748−2446ad S2 S55 S62 S4716 SAX J1747.0−2853 SAX J1808.4−3658 SAX J1810.8−2609 SWEEPS J175853...
9 KB (708 words) - 06:56, 21 August 2024
It is visible to the naked eye, having an apparent visual magnitude of +4.29. Based upon an annual parallax shift of 24.31 mas as seen from Earth, it...
11 KB (875 words) - 07:43, 21 August 2024
space in the general direction of the Earth with a radial velocity of −43.4 km/s. This is a visual binary with an orbital period of 5.72 years, an eccentricity...
8 KB (592 words) - 19:54, 18 July 2024
apparent visual magnitude of +3.51. Based upon an annual parallax shift of 8.4 mas as seen from Earth, this system is located around 390 light years from...
7 KB (483 words) - 08:04, 3 June 2024
Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book...
7 KB (509 words) - 06:05, 21 August 2024
faintly visible to the naked eye, having an apparent visual magnitude of +4.98; it is 0.16 degree north of the ecliptic. The annual parallax shift of...
7 KB (478 words) - 06:09, 21 August 2024
B1821−24 PSR B1857−26 PSR J1808−2024 PSR J1747−2958 PSR J1748−2446ad S2 S55 S62 S4716 SAX J1747.0−2853 SAX J1808.4−3658 SAX J1810.8−2609 SWEEPS J175853...
7 KB (610 words) - 07:14, 21 September 2024
each other over a period of roughly 700 years, having an eccentricity of 0.4 and a semimajor axis of 2 arc seconds. The pair have a combined spectral type...
9 KB (627 words) - 17:37, 18 July 2024
that are visible to the naked eye. Based upon an annual parallax shift of 32.4 mas as seen from Earth, it is located 101 light years from the Sun. The star...
9 KB (752 words) - 00:56, 30 November 2023
is visible to the naked eye with a combined apparent visual magnitude of +4.01. Based upon an annual parallax shift of 10.40 mas as seen from Earth, it...
12 KB (936 words) - 18:45, 18 July 2024
Sun. It is drifting further away with a heliocentric radial velocity of +15.4 km/s. This star is a pre-main-sequence solar analog with a stellar classification...
11 KB (926 words) - 00:11, 18 July 2024