قطر-3
| بيانات الرصـد الحقبة J2000.0 اعتدال J2000.0 | |
|---|---|
| الكوكبة | المرأة المسلسلة[1] |
| الصعود المستقيم | 23س 56د 36.48327ث[2] |
| الميل | +36° 12′ 46.7749″[2] |
| القدر الظاهري (V) | 12.88[3] |
| الخـصـائص | |
| النوع الطيفي | G0V[3] |
| النوع المتغير | planetary transit |
| علم القياسات الفلكية | |
| السرعة القطرية (Rv) | −2.32±13.31[2] كم/ث |
| الحركة الحقيقية (μ) | RA: −17.868[2] mas/yr Dec.: −8.553[2] mas/س |
| اختلاف المنظر (π) | 1.5818 ± 0.0218[2] mas |
| المسافة | س ض ( ف ن) |
| التـفـاصـيل[3] | |
| الكتلة | 1.145±0.064 M☉ |
| نصف القطر | 1.272±0.14 R☉ |
| الضياء | 1.90±0.46 L☉ |
| جاذبية السطح (ج) | 4.28±0.05 س.ج.ث. |
| درجة الحرارة | 5,991±64 ك |
| المعدنية [Fe/H] | −0.041±0.081 العشرية |
| الدوران | 6.31 |
| تسارع الدوران (v sin i) | 10.4±0.5 كم/ث |
| العمر | 310±1 م.س. |
| تسميات أخرى | |
| مراجع قواعد البيانات | |
| SIMBAD | data |
قطر-3 is a 12th magnitude star located in the northern constellation Andromeda. It is host to a transiting planet.[3] With a radial velocity of 10.99 km/s, it is drifting away from the Solar System, and is currently located 2,400 light years away based on its annual parallax.
الخصائص
This star is a G-type star with 14.5% more mass than the Sun, and 27.2% larger. It has a luminosity of almost two times that of the Sun, and has effective temperature of 5,991 K, which gives it a yellow hue. Qatar-3 is also a metal poor star that has a similar metallicity to the Sun, and has a rapid rotation rate of 10.4 km/s. This means it takes Qatar-3 6.31 days to complete a full rotation, while the Sun takes almost a month to rotate.
النظام الكوكبي
In 2016, the Qatar Exoplanet Survey discovered a planet around Qatar-3, Qatar-4, and Qatar-5, which was led by an international team in Qatar. Qatar-3b is a massive planet, with 4.31 times the mass of Jupiter, and has a similar radius to the latter. With a density of 4.0 g/cm3, this is one of the densest planets discovered. With an effective temperature of 1,681 K, it is a scorching planet.[5]
| الرفيق (بالترتيب من النجم) |
الكتلة | نصف المحور الأكبر (AU) |
الدور المداري (أيام) |
الانحراف | الميل | نصف القطر |
|---|---|---|---|---|---|---|
| b | 4.31±0.47 MJ | 0.03783±0.00069 | 2.5079204 | 0 | 1.096±0.14 RJ |
| الاكتشاف[3] | |
|---|---|
| اكتشفه | Alsubai et al. 2019 |
| تاريخ الاكتشاف | 2016 |
| Transit | |
| السمات المدارية | |
| 0.03783±0.00069 au[3] | |
| Eccentricity | 0[3] |
| 2.5079204 d[3] | |
| Inclination | 86.8°±2.0°[3] |
| Semi-amplitude | 587±58 m/s[3] |
| السمات الطبيعية | |
نصف القطر المتوسط | 1.096±0.14 jupiter radius[3] |
Mean radius | 1.096±0.14 jupiter radius[3] |
| Mass | 4.31±0.47 jupiter mass[3] |
Mean density | 4.0±1.2 g/cm3[3] |
| Temperature | 1,681±84 K[3] |
قطر-3ب
Qatar-3b is a hot Jupiter.[6] It orbits its star every 2.5 days. It was discovered in 2016 by the Qatar Exoplanet Survey (QES).[7][3] This planet was discovered by QES along with Qatar-4b and Qatar-5b. The light curves of the planet's respective host stars have been observed as well during the survey, along with their stellar properties.[3]
المدار
This planet is another typical hot Jupiter. It orbits very close to its star with a period of 2 days, 12 hours, 11 minutes, and 24 seconds.[8] This corresponds with an orbital distance of about 0.04 AU, which is 10 times closer to its star than Mercury is to the Sun. With an eccentricity of 0, this suggests that Qatar-3b is on a perfectly circular orbit.
الخصائص الفيزيائية
Qatar-3b is a massive planet, with 4.31 times the mass of Jupiter, but a similar radius. With a density of 4.0 g cm−3, this is one of the densest planets discovered. With an effective temperature of 1,681 K, it is a scorched planet.[3]
المصادر
- ^ قالب:Cite constellation
- ^ أ ب ت ث ج ح قالب:Cite Gaia DR3
- ^ أ ب ت ث ج ح خ د ذ ر ز س ش ص ض ط ظ Alsubai, Khalid; et al. (2017). "Qatar Exoplanet Survey: Qatar-3b, Qatar-4b, and Qatar-5b". The Astronomical Journal. 153 (4). 200. arXiv:1606.06882. Bibcode:2017AJ....153..200A. doi:10.3847/1538-3881/aa6340. S2CID 119214858.
- ^ "Qatar 3". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-26.
- ^ "Astronomers discover three 'Qatar' exoplanets". phys.org (in الإنجليزية). Retrieved 2021-03-26.
- ^ "Qatar-3". Universe Guide (in الإنجليزية). 15 September 2018. Retrieved 2019-12-27.
- ^ "Astronomers discover three 'Qatar' exoplanets".
- ^ "Convert a Decimal Time Amount to Days, Hours, Minutes and Second". www.spikevm.com. Retrieved 2021-03-25.