31 Aquilae
| Data pengamatan Epos J2000 Ekuinoks J2000 | |
|---|---|
| Rasi bintang | Aquila |
| Asensio rekta | 19h 24m 58.2004s |
| Deklinasi | +11° 56′ 39.896″ |
| Magnitudo tampak (V) | 5.16 |
| Ciri-ciri | |
| Kelas spektrum | G8IV |
| Indeks warna U−B | 0.45 |
| Indeks warna B−V | 0.77 |
| Jenis variabel | Variable star |
| Astrometri | |
| Kecepatan radial (Rv) | -100.1 km/s |
| Gerak diri (μ) | RA: 721.36 mdb/thn Dek.: 643.67 mdb/thn |
| Paralaks (π) | 66,01±0,77 mdb |
| Jarak | 49,4 ± 0,6 tc (15,1 ± 0,2 pc) |
| Magnitudo mutlak (MV) | 5.93 |
| Detail | |
| Massa | 1.14 M☉ |
| Radius | 1.34 R☉ |
| Luminositas | 1.64 L☉ |
| Suhu | 5,656 K |
| Metalisitas | ? |
| Rotasi | < 17 Km/s 0,008981 Year |
| Usia | 5.3×109 tahun |
| Orbit bintang ganda visual | |
| Bintang sekunder | 31 Aquilae B |
| Periode (P) | tahun |
| Sumbu semi-mayor (a) | 98.7" |
| Eksentrisitas (e) | |
| Inklinasi (i) | 335° |
| Bujur node (Ω) | ° |
| Epoch periastron (T) |
|
| Orbit bintang ganda visual | |
| Bintang sekunder | 31 Aquilae C |
| Periode (P) | tahun |
| Sumbu semi-mayor (a) | 114.2" |
| Eksentrisitas (e) | |
| Inklinasi (i) | 316° |
| Bujur node (Ω) | ° |
| Epoch periastron (T) | |
| Penamaan lain | |
b Aql, NSV 11994, GCRV 11861, LTT 15668, SRS 31503, 2MASS J19245822+1156401, TD1 24621, GJ 759, N30 4300, TYC 1063-519-1, AG+11° 2263, HD 182572, NLTT 47763, UBV 16443, ASCC 976604, HIC 95447, PLX 4541, UBV M 23748, BD+11° 3833, HIP 95447, PMC 90-93 1065, USNO-B1.0 1019-00522349, [[
CCDM]] J19249+1157A, HR 7373, PM 19226+1150, YZ 11 7220, Ci 20 1152, IDS 19202+1143 A, PPM 136256, CSI+11 3833 1, IRAS 19226+1150, ROT 2792, CSV 101833, LFT 1477, SAO 104807, FK5 1503, LHS 3463, GC 26809, LSPM J1924+1156, SPOCS 840. | |
| Referensi basis data | |
| SIMBAD | data |
| Referensi basis data | |
| SIMBAD | data |
| Sumber data: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
31 Aquilae (b Aquilae) adalah bintang yang berukuran subraksasa di rasi Aquila. Bintang ini bermagnitudo 5.17. Bintang ini diperkirakan berusia 5 miliar tahun.
Grup
[sunting | sunting sumber]Selain rasi Aquila, bintang ini juga merupakan anggota dari kelompok berikut:
| nama rasi / asterisma / kelompok | asal | arti | anggota lainnya |
|---|---|---|---|
| 61 Cygni Group[1] | (antara lain): β Col, HD 131111, HD 3443, 61 Cyg, π Men, HD 142, HD 55526, 14 Tau, HD 150275, 68 Vir, HD 53501 |
Referensi
[sunting | sunting sumber]- ^ Eggen, O. J. (1959). "White dwarf members of the 61 Cygni group". The Observatory. 79: 135–39. Diakses tanggal 2007-07-17. – Gives space velocity components of U=+94, V=-53 and W=-7 for HD 201091/2.
- The Old Disk Metal-Rich Subgiant 31 Aquilae
- Image 31 Aquilae
- HR 7373 Diarsipkan 2011-01-31 di Wayback Machine.
- HR 7373
- CCDM 19249+1157
- R.A. Wittenmeyer et al., "Detection Limits from the McDonald Observatory Planet Search Program", The Astronomical Journal, Volume 132, Issue 1, pp. 177-188, May, 2006.
Komponen
[sunting | sunting sumber]| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| 31 Aquilae B (HD 231345) | 19h 24m 51.8595s | +11° 57' 14.692 | 8.56 | G0 | Simbad |
| 31 Aquilae C (BD+11 3833C) | 19h 24m 50.8s | +11° 57' 36 | 10.6 | Simbad |