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ephemeris time


  • WordNet 3.6
    • n ephemeris time (astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions
    • ***


In literature:

The equation of time and the sidereal time of mean noon complete the ephemeris proper.
"Side-lights on Astronomy and Kindred Fields of Popular Science" by Simon Newcomb
He checked the time with the satellite ephemeris.
"Pushbutton War" by Joseph P. Martino

In science:

Wood & Crawford (1986) were able to use their high-speed photometric observations to derive an ephemeris for IP Peg based on white dwarf egress timings.
A TiO study of the dwarf nova IP Pegasi
First, the mid-white dwarf egress timings of Wood et al. (1989) and Wolf et al. (1993) were fitted with a linear ephemeris, and this ephemeris was initially used to phase all of our spectra.
A TiO study of the dwarf nova IP Pegasi
Data (obtained with pn Fast Timing mode observations, with the exception of the hardest band, based on pn Small Window mode data) have been folded using the radio ephemeris quoted in Table 2.
On the polar caps of the 3 Musketeers
Most of the red spectra also record the He I λ6678 absorption line, and we decided to measure the stellar radial velocity from this line to check on the orbital ephemeris at the time of the HST observations.
Stellar Wind Variations During the X-ray High and Low States of Cygnus X-1
Figure 3 shows the O-C diagram for transit timing variations (left panel) computed from a new ephemeris we have derived .
Transit Timing Observations of the Extrasolar Hot-Neptune Planet GL 436b
The difference of the observed and calculated times of zero phase according to a linear ephemeris in days.
Surprising variations in the rotation of the chemically peculiar stars CU Virginis and V901 Orionis
Right: The difference of the observed zero phase time and the time calculated according to the linear ephemeris in fractions of a day.
Surprising variations in the rotation of the chemically peculiar stars CU Virginis and V901 Orionis
We provide a refined ephemeris for WASP -3b and improved orbital/physical parameters. A contact eclipsing binary, serendipitously discovered among field stars, is re ported here for the first time.
TASTE. III. A homogeneous study of transit time variations in WASP-3b
The available data thus strongly suggest an intrinsic deviation of the actual transit times from the linear ephemeris expected from a Keplerian two-body transiting system.
TASTE. III. A homogeneous study of transit time variations in WASP-3b
The reference epoch of the second Princeton ephemeris is very near to the third observation, nevertheless the use of the ephemeris which represents an extended time-span of rapidly varying periods, fails to give a pulse shape by itself.
Post-Glitch RXTE-PCA Observations of the Vela Pulsar
This may be due to the existence of two distinct decay time scales of Vela, 3 days and 30 days, which were observed in all previous glitches and fall within the ranges of ephemeris (Alpar et al. 1993).
Post-Glitch RXTE-PCA Observations of the Vela Pulsar
In view of the rapidly varying period at those epochs, the pulse shapes of the first part of the observations were obtain ed by a careful interpolation amounting to the construction of an ephemeris that can represent the rapid changes in the pulsar’s timing parameters in this postglitch epoch.
Post-Glitch RXTE-PCA Observations of the Vela Pulsar
Then, the arrival times were additionally corrected to the Her X-1 center of mass using the ephemeris of Deeter et al. (1991).
A BeppoSAX observation of Her X-1 during the first main-on after an anomalous low-state: evidence for rapid spin-down
Phase zero is set by the mid-eclipse time for eclipse N = 43684 and then applied to the other eclipses so that all ingress points can be seen phased to the same local ephemeris.
Possible Magnetic Activity in the Low Mass X-ray Binary EXO 0748-676
Somenzi, INPOP08, a 4-D planetary ephemeris: From asteroid and time-scale computations to ESA Mars Express and Venus Express contributions, Astron.
A-priori "imprinting" of General Relativity itself on some tests of it?