00155-1608 HEI 299

 
 
00h 15m 27.99s -16 08' 01.8" P.A. 232.70 sep 0.4 mag 11.00,11.40 Sp M3.5V+M5V dist. 4.99 pc (16.28 l.y.)
 
 
Coord 2000
00155-1608
Discov num
HEI 299
Comp
Coord arcsec 2000
00 15 27.99 -16 08 01.8
Date first
1985
Date last
2020
Obs
38
Pa first
130
Pa last
237
P.A. Now (θ)
232.7°
Sep first
0.2
Sep last
0.4
Sep. Now (ρ)
0.39"
Mag pri
11.00
Mag sec
11.40
delta mag (ΔM)
0.4
Spectral class
M3.5V+M5V (red/red)
Pri motion ra
-677
Sec motion ra
Pri motion dec
-561
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
236.6
Precise sep
0.417
Constellation
Cetus
HIP
1242
HD
1242
GL
GJ 1005A
Distance
4.99
Distance ly
16.28
last precise pa
236.6
last precise sep
0.417
 
 
ORBITAL ELEMENTS
 
 
Period (P)4.55y± 0.002 Periastron (T)1995.363y± 0.016 Semi-major axis (a)0.306a± 0.002
Eccentricity (e)0.36± 0.005 Inclination (i)145.6°± 1.3 Longitude of periastron (ω)344.5°± 2.2
Node (Ω)60.8°± 1.4 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.198 60.7
2001 0.285 307.3
2002 0.404 260.1
2003 0.372 224.9
2004 0.198 148.0
2005 0.216 0.1
2006 0.351 281.8
2007 0.412 244.9
2008 0.300 202.3
2009 0.193 75.7
2010 0.269 314.8
2011 0.398 263.7
2012 0.384 228.9
2013 0.212 161.6
2014 0.210 12.7
2015 0.338 286.6
2016 0.413 248.3
2017 0.319 208.2
2018 0.188 91.4
2019 0.254 323.1
2020 0.390 267.4
2021 0.393 232.7
2022 0.230 173.3
2023 0.206 25.9
2024 0.323 291.9
2025 0.413 251.6
2026 0.336 213.6
2027 0.185 107.9
2028 0.241 332.4
2029 0.380 271.2
2030 0.401 236.3


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds00155-1608c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
00155-1608 HEI 299 2004 24 3 0.2 11.00 11.40 M3.5V M5V NOD 001527.67-160756.3
00155-1608 HEI 299 2007 25 221 0.4 11.00 11.40 M3.5V M5V NOD 001527.67-160756.3
00155-1608 HEI 299 2010 26 279 0.3 11.00 11.40 M3.5V M5V NOD 001527.67-160756.3
00155-1608 HEI 299 2014 31 295 0.3 11.00 11.40 M3.5V+M5V NO 001527.67-160756.3
00155-1608 HEI 299 2015 32 252 0.4 11.00 11.40 M3.5V+M5V NO 001527.67-160756.3
00155-1608 HEI 299 2017 50 149 0.2 11.00 11.40 M3.5V+M5V NO 001527.99-160801.8
00155-1608 HEI 299 2019 36 270 0.4 11.00 11.40 M3.5V+M5V NO 001527.99-160801.8

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