enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Orbital decay - Wikipedia

    en.wikipedia.org/wiki/Orbital_decay

    Orbital decay is a gradual decrease of the distance between two orbiting bodies at their closest approach (the periapsis) over many orbital periods. These orbiting bodies can be a planet and its satellite , a star and any object orbiting it, or components of any binary system .

  3. Simplified perturbations models - Wikipedia

    en.wikipedia.org/wiki/Simplified_perturbations...

    Simplified Deep Space Perturbations (SDP) models apply to objects with an orbital period greater than 225 minutes, which corresponds to an altitude of 5,877.5 km, assuming a circular orbit. [ 3 ] The SGP4 and SDP4 models were published along with sample code in FORTRAN IV in 1988 with refinements over the original model to handle the larger ...

  4. ZTF J153932.16+502738.8 - Wikipedia

    en.wikipedia.org/wiki/ZTF_J153932.16+502738.8

    The orbital period is decreasing at 2.373 × 10 −11 seconds per second giving a characteristic timescale of 210,000 years. [1] This decay is mostly due to the emission of gravitational waves, however 7% of the decay could be due to tidal losses. [1] The decay is predicted to go for 130,000 years when the orbital period should reach 5 minutes.

  5. Hulse–Taylor pulsar - Wikipedia

    en.wikipedia.org/wiki/Hulse–Taylor_pulsar

    The period of the orbital motion is 7.75 hours, and the two neutron stars are believed to be nearly equal in mass, about 1.4 solar masses. Radio emissions have been detected from only one of the two neutron stars. The minimum separation at periastron is about 1.1 solar radii; the maximum separation at apastron is 4.8 solar radii. The orbit is ...

  6. UAH satellite temperature dataset - Wikipedia

    en.wikipedia.org/wiki/UAH_satellite_temperature...

    The sensors deteriorate over time, and corrections are necessary for satellite drift and orbital decay. Particularly large differences between reconstructed temperature series occur at the few times when there is little temporal overlap between successive satellites, making intercalibration difficult.

  7. WASP-4b - Wikipedia

    en.wikipedia.org/wiki/WASP-4b

    The planet's orbital period appears to be decreasing at a rate of 7.33 ± 0.71 milliseconds per year, suggesting that its orbit is decaying, with a decay timescale of 15.77 ± 1.57 million years. The anomalously high rate of orbital decay of WASP-4b is poorly understood as of 2021.

  8. Gravitational-wave astronomy - Wikipedia

    en.wikipedia.org/wiki/Gravitational-wave_astronomy

    The first indirect evidence for the existence of gravitational waves came in 1974 from the observed orbital decay of the Hulse–Taylor binary pulsar, which matched the decay predicted by general relativity as energy is lost to gravitational radiation.

  9. Allen Steele - Wikipedia

    en.wikipedia.org/wiki/Allen_Steele

    Steele began publishing short stories in 1988. His early novels formed a future history beginning with Orbital Decay and continuing through Labyrinth of Night. Some of his early novels such as Orbital Decay and Lunar Descent were about blue-collar workers working on future construction projects in space. Since 1992, he has tended to focus on ...