J/ApJS/273/25 Positions of 5 Uranian satellites from Yunnan obs. (Zhang+, 2024)
Observations of five major Uranian satellites during 2013-2020 based on Gaia
DR3.
Zhang H.Y., Yu Y., Qiao R.C., Yan D., Cheng X., Tang K., Mao Y.D.
<Astrophys. J. Suppl. Ser., 273, 25 (2024)>
=2024ApJS..273...25Z 2024ApJS..273...25Z
ADC_Keywords: Minor planets; Solar system; Optical
Keywords: Uranian satellites
Abstract:
A total of 10,339 positions of the five major Uranian satellites
(Ariel, Umbriel, Titania, Oberon and Miranda) were collected at the
Yunnan Observatories from 2013 to 2020 with the 1.0m astrometric
reflector. A median filtering method was applied to reduce the
influence of the bright Uranus halo. All CCD observational data was
analyzed by the newly developed CCD image-processing software with
Gaia DR3 as the reference catalog. The impact of different exposure
times on satellite positioning accuracy was evaluated. The
observational positions of satellites were compared with theoretical
positions from Institut de Mecanique Celeste et de Calcul des
Ephemerides (DE441 and Lainey+ 2015) and the mean offsets are from
-0.115" to 0.103" in both R.A. and decl. for the five satellites. The
standard deviation of the offsets are from 0.008" to 0.086" for the
four greatest Uranian satellites and from 0.037" to 0.132" for Miranda
in each direction. These precise observations of the five major
Uranian satellites over an 8yr period will be very useful for
improving the orbital parameters of both Uranus and its five major
satellites.
Description:
From 2013 to 2020, the days before and after oppositions of Uranus
provided ideal opportunities to conduct astrometric observations of
Uranus and its five major satellites, Ariel, Umbriel, Titania, Oberon
and Miranda. To perform these observations, we utilized the 1.0m
astrometric reflector of the Yunnan Observatories
(N:25°1.5',E:102°47.3', height 2000m, IAU code 286).
No filter was used for the observations of 2013-2017, while a
Johnson I filter was used for the observation of 2019-2020.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 47 10339 List of observed positions of the five major
Uranian satellites from Yunnan observatory
(IAU code 286)
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See also:
B/astorb : Orbits of Minor Planets (Bowell+, 2014-)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
I/359 : Gaia DR3 Part 5. Solar System (Gaia Collaboration, 2022)
J/A+AS/107/559 : Position of Uranian satellites (Veiga+, 1994)
J/A+AS/113/557 : Uranian satellites (Veiga+, 1995)
J/A+AS/138/247 : Uranian satellites 1995-1998 (Veiga+, 1999)
J/A+A/391/775 : Uranian satellites in 1995/97 (Shen+, 2002)
J/A+A/454/683 : Position of Uranian satellites (Veiga+, 2006)
J/AJ/161/237 : Positions of Triton with Sheshan Station tel. (Zhang+, 2021)
J/AJ/164/37 : 2008-2014 positions of 5 Uranian satellites (Zhang+, 2022)
J/other/PSS/210.1 : Astrometry of the 5 largest Uranian sat. (Camargo+, 2022)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Sat Satellite (1)
4- 7 I4 yr Obs.Y [2013/2020] Year of observation
9- 10 I2 "month" Obs.M Month of observation
12- 20 F9.6 d Obs.D Day of observation; UTC (2)
22- 22 I1 h RAh [0/2] Hour of right ascension (J2000) (3)
24- 25 I2 min RAm Minute of right ascension (J2000)
27- 33 F7.4 s RAs Second of right ascension (J2000)
35- 35 A1 --- DE- [+] Sign of declination (J2000) (3)
36- 37 I2 deg DEd [3/13] Degree of declination (J2000) (3)
39- 40 I2 arcmin DEm Arcminute of declination (J2000)
42- 47 F6.3 arcsec DEs Arcsecond of declination (J2000)
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Note (1): Uranian satellite as follows:
U1 = Ariel (2346 occurrences)
U2 = Umbriel (2228 occurrences)
U3 = Titania (2395 occurrences)
U4 = Oberon (2391 occurrences)
U5 = Miranda (979 occurrences)
Note (2): The decimal day corresponds to the middle time of each exposure.
Note (3): R.A. and decl. are topocentric and refer to the International
Celestial Reference System.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 31-Dec-2024