Coord 2000 | 00247-2653 | Discov num | LEI 1 | Comp | BC | Coord arcsec 2000 | 00 24 44.24 -27 08 26.5 | ||||
Date first | 1993 | Date last | 2021 | Obs | 84 | ||||||
Pa first | 330 | Pa last | 183 | P.A. Now (θ) | 198.4° | ||||||
Sep first | 0.3 | Sep last | 0.457 | Sep. Now (ρ) | 0.449" | ||||||
Mag pri | 18.69 | Mag sec | 19.07 | delta mag (ΔM) | 0.38 | Spectral class | M8.5V+M9V (red/red) | ||||
Pri motion ra | -055 | Sec motion ra | -055 | ||||||||
Pri motion dec | +612 | Sec motion dec | +612 | ||||||||
Notes | N O (See Notes, Orbital solution) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 00 24 44 -27 08 25 | HEN 5 Aa,Ab | 1998 | 0 | -1 | 0.1 | 15.50 | 18.00 | 2.50 | ||||
Show | 00 24 44 -27 08 25 | LEI 1 AB | 2021 | 70 | 62 | 0.9 | 15.40 | 18.69 | 3.29 | ||||
Show | 00 24 44 -27 08 25 | LEI 1 AC | 2010 | 3 | 23 | 1.5 | 15.40 | 19.07 | 3.67 | ||||
Show | 00 24 44 -27 08 26 | LEI 1 BC | 2021 | 84 | 183 | 0.5 | 18.69 | 19.07 | 0.38 | Y | <=== |
Constellation | Sculptor |
Period (P) | 17.247y | ± 0.016 | Periastron (T) | 2006.44y | ± 0.007 | Semi-major axis (a) | 0.4598a | ± 0.0007 |
Eccentricity (e) | 0.0172 | ± 0.0008 | Inclination (i) | 62.04° | ± 0.11 | Longitude of periastron (ω) | 202.53° | |
Node (Ω) | 14.82° | ± 0.12 | Notes | n | Reference | Tok2018j | ||
Equinox | Last observation | 2017 | Grade | 2 | (1=Definitive, 9=Indet.) |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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discov_num | notes | refcode |
LEI 1 | Paper includes orbit of BC pair and estimate of mass sum. | Lei2001a |
HST WFPC2 photometry was also transformed to standard Johnson B and V | ||
and Cousins R and I filters, yielding the following magnitudes for the | ||
A, B, and C components: | Lei2000 | |
------ A ----- ------ B ----- ------ C ----- filt | ||
17.17 +/- 0.05 20.57 +/- 0.07 21.48 +/- 0.11 B | ||
15.35 0.04 18.68 0.06 19.07 0.07 V | ||
13.63 0.04 16.30 0.05 16.65 0.05 R | ||
11.66 0.04 14.01 0.05 14.43 0.05 I | ||
Seifahrt et al. (2008) determine mass sum of BC pair to be 0.157 +/- | Sef2008 | |
0.009 Msun; mass of A 0.115 +/- 0.010 Msun. They find no sign of the | ||
fourth component reported by Henry et al. (1999). | Hen1999 | |
Rajpurohit et al. (2012) derive Teff, log g, radius, luminosity, and | Raj2012 | |
spectral type for the components of LHS 1070 using various models. | ||
Mean values (assuming distance = 8.8pc) are: | ||
Teff (K) log g radius (Rsun) log(L/Lsun) spec | ||
A: 2950 5.3 0.136 -2.92 M5.5 | ||
B: 2400 5.5 0.102 -3.44 M9.5 | ||
C: 2300 5.5 0.099 -3.55 L0 | ||
Koehler et al. (2012) derive masses for the A, B, and C components of | ||
0.172+/-0.010, 0.077+/-0.005, and 0.071+/-0.004 Msun, respectively. | Koh2012 | |
VLTI Limb-darkened diameter 1.149 +/- 0.11 mas, | LTI2003a | |
M = 0.631 +/- 0.031 \msun, R = 0.702 +/- 0.063 \rsun, | ||
T = 3520 +/- 170 K. |
refcode | metd | author | reference |
Hen1999 | Hf j | Henry, T.J., Franz, O.G., Wasserman, L.H., Benedict G.F., Shelus, P.J., | 1999ApJ...512..864H |
Hen1999 | +Xs | Ianna, P.A., Kirkpatrick, J.D. & McCarthy, D.W., Jr. | |
Hen1999 | ApJ 512, 864, 1999 | ||
Koh2012 | orb j | Koehler, R., Ratzka, T., & Leinert, Ch. | 2012A&A...541A..29K |
Koh2012 | +A | A&A 541, A29, 2012 | |
Koh2012 | +Si | ||
Lei2000 | Hp j | Leinert, Ch., Allard, F., Richichi, A., & Hauschildt, P.H. | 2000A&A...353..691L |
Lei2000 | A&A 353, 691, 2000 | ||
Lei2001a | Si j | Leinert, Ch., Jahreiss, H., Woitas, J., Zucker, S., Mazeh, T., Eckart, A., & | 2001A&A...367..183L |
Lei2001a | +Hf | Koehler, R. | |
Lei2001a | +A | A&A 367, 183-188, 2001 | |
Lei2001a | +orb | (measures for AB as quoted in Koh2012) | |
LTI2003a | not j | Segransan, D., Kervella, P., Forveille, T. & Queloz, D. | 2003A&A...397L...5S |
LTI2003a | A&AL 397, 5, 2003 | . | |
Raj2012 | - | Rajpurohit, A.S., Reyle, C., Schultheis, M., Leinert, Ch., Allard, F., | 2012A&A...545A..85R |
Raj2012 | Homeier, D., Ratzka, T., Abraham, P., Moster, B., Witte, S., & Ryde, N. | ||
Raj2012 | A&A 545, A85, 2012 | ||
Sef2008 | orb j | Seifahrt, A., Roll, T., Neuhauser, R., Reiners, A., Kerber, F., Kaufl, H., | 2008A&A...484..429S |
Sef2008 | +A | Siebenmorgen, R., & Smette, A. | |
Sef2008 | A&A 484, 429, 2008 | ||
Tok2018j | orb j | Tokovinin, A. | 2018AJ....155..160T |
Tok2018j | AJ 155, 160, 2018 |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
00247-2653 | LEI 1 | BC | 2007 | 44 | 221 | 0.3 | 15.30 | NOD | 002444.24-270826.5 | ||
00247-2653 | LEI 1 | BC | 2010 | 45 | 308 | 0.3 | 15.90 | 16.30 | NOD | 002444.24-270826.5 | |
00247-2653 | LEI 1 | BC | 2015 | 63 | 30 | 0.4 | 18.69 | 19.07 | NO | 002444.24-270826.5 | |
00247-2653 | LEI 1 | BC | 2017 | 65 | 73 | 0.2 | 18.69 | 19.07 | NO | 002444.24-270826.5 | |
00247-2653 | LEI 1 | BC | 2018 | 67 | 122 | 0.2 | 18.69 | 19.07 | NO | 002444.24-270826.5 | |
00247-2653 | LEI 1 | BC | 2019 | 69 | 160 | 0.3 | 18.69 | 19.07 | NO | 002444.24-270826.5 | |
00247-2653 | LEI 1 | BC | 2020 | 70 | 176 | 0.4 | 18.69 | 19.07 | NO | 002444.24-270826.5 | |
00247-2653 | LEI 1 | BC | 2021 | 84 | 183 | 0.5 | 18.69 | 19.07 | NO | 002444.24-270826.5 |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
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A | Ab | B | |
Ab | pa=0.0° sep=0.00" | ||
B | pa=169.9° sep=1.52" | pa=169.9° sep=1.52" | |
C | pa=21.0° sep=1.44" | pa=21.0° sep=1.44" | pa=5.0° sep=2.86" |
Coord arcsec 2000 | 002444.22-270825.0 | Mag | 15.4 | Spectral class | M5.5V (red) | PmRA | -93.00 | ||||
PmDE | 696.0 |
Coord arcsec 2000 | 002444.22-270825.0 | Mag | 18 | Calc delta mag | 2.5 | Calc coord | yes |
Coord arcsec 2000 | 002444.24-270826.5 | Coord calc | 002444.24-270826.5 | Mag | 18.69 | Spectral class | M8.5V (red) | ||||
PmRA | -55.00 | PmDE | 612.0 | Calc delta mag | 3.19 |
Coord arcsec 2000 | 002444.26-270823.7 | Mag | 19.07 | Spectral class | M9V (red) | PmRA | -55.00 | ||||
PmDE | 612.0 | Calc delta mag | 3.57 | Calc coord | yes |