18 Boötis
| Data pengamatan Epos J2000 Ekuinoks J2000 | |
|---|---|
| Rasi bintang | Boötes |
| Asensio rekta | 14h 19m 16.2803s |
| Deklinasi | +13° 00′ 15.476″ |
| Magnitudo tampak (V) | 5.4 |
| Ciri-ciri | |
| Kelas spektrum | F5IV |
| Indeks warna U−B | -0.03 |
| Indeks warna B−V | 0.38 |
| Indeks warna R−I | 0.19 |
| Astrometri | |
| Kecepatan radial (Rv) | -3 km/s |
| Gerak diri (μ) | RA: 105.91 mdb/thn Dek.: -32.22 mdb/thn |
| Paralaks (π) | 38,33±0,81 mdb |
| Jarak | 85 ± 2 tc (26,1 ± 0,6 pc) |
| Magnitudo mutlak (MV) | 5.764 |
| Detail | |
| Massa | 1,7 M☉ |
| Radius | 1,4 R☉ |
| Luminositas | 6 L☉ |
| Suhu | 6,000–7,500 K |
| Rotasi | 39 km/s 0,00498246877938 Year |
| Orbit bintang ganda visual | |
| Bintang sekunder | CCDM 14192+1300 B BUP ENG 51 |
| Periode (P) | tahun |
| Sumbu semi-mayor (a) | 156.4" |
| Eksentrisitas (e) | |
| Inklinasi (i) | 217° |
| Bujur node (Ω) | ° |
| Epoch periastron (T) | |
| Penamaan lain | |
GCRV 8373, IRAS F14168+1314, SAO 100975, AG+13° 1387, JP11 2499, BD+13° 2782, GJ 3841, 2MASS J14191627+1300155, TD1 17398, CCDM J14192+1300, GSC 00915-01442, N30 3247, TYC 915-1442-1, CSI+13 2782 1, HD 125451, PMC 90-93 961, UBV M 20120, 2E 1416.8+1313, HIC 69989, PPM Star Catalogue 130492, UBV 12580, 2E 3242, HIP 69989, RBS 1371, uvby98 100125451, FK5 1372, HR 5365, ROT 2057, YZ 13 5083, GAT 343, IDS 14145+1328, RX J1419.2+1300, GC 19319, IRAS 14168+1314, 1RXS J141916.7+130021. | |
| Referensi basis data | |
| SIMBAD | data |
| Sumber data: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
18 Boötis adalah salah satu bintang di rasi Boötes yang terletak pada jarak 85 tahun cahaya dari Bumi. Bintang ini memiliki magnitudo 5.41. Bintang ini termasuk bintang subraksasa putih (white subgiant) dengan kelas F5IV. Bintang ini memiliki kecemerlangan 4 kali Matahari dan radius 1.6 kali Matahari.
Etimologi
Nama lain dari para astronom terdahulu adalah:
| nama lain | asal bahasa | arti |
|---|---|---|
| 亢池四 / Kàngchísì | China | bintang keempat pada rasi Perahu dan Danau[1] |
Selain rasi Boötes, bintang ini juga merupakan anggota dari berbagai rasi, asterisma atau kelompok berikut:
| nama rasi / asterisma / kelompok | asal | arti | anggota lainnya |
|---|---|---|---|
| 亢池 / Kàngchí | China | Perahu dan Danau | 20 Boo, 14 Boo |
| Ursa Major Moving Group[2] | (core star antara lain): 37 UMa, β UMa, γ UMa, δ UMa, ε UMa, 78 UMa, ζ UMa, 80 UMa
stream star: δ Aqr, β Aur, ζ Boo, χ Cet A, 29 Com, ζ Crt, α CrB, 59 Dra, 21 LMi, γ Lep, 16 Lyr, γ Mic, χ1 Ori, 89 Psc, β Ser, ω Ser, τ6 Ser, 6 Sex, 66 Tau, ζ TrA, π1 UMa, 41 Vir | ||
| Mons Maenalus | Latin | gunung Maenalus | (antara lain) 31 Boo, 15 Boo, 14 Boo |
Referensi
- HR 5365
- CCDM J14192+1300
- HR 5365 Diarsipkan 2011-09-01 di Wayback Machine.
- Image 18 Boötis
- http://www.pa.msu.edu/people/horvatin/Astronomy_Facts/obsolete_pages/mons_maenalus.htm Diarsipkan 2008-10-13 di Wayback Machine.
- http://www.ianridpath.com/startales/monsmaenalus.htm
Pranala luar
- [1] Diarsipkan 1999-10-07 di Wayback Machine. Arizona University website
- [2] Ken Croswell's astronomy website.
- LeDrew, Glenn (1998). "AstroNotes: The Ursa Major Moving Cluster" Diarsipkan 2005-04-06 di Wayback Machine.. Retrieved July 28, 2005.
- Stellar kinematic groups, Superclusters, Moving Groups - D. Montes, UCM
- [3] J.R.King et al. 2003 Astronomical Journal paper classifying group members based on Hipparcos data.
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