Coord 2000 | 20462+1554 | Discov num | STF2725 | Comp | AB | Coord arcsec 2000 | 20 46 13.31 +15 54 26.4 | ||||
Date first | 1821 | Date last | 2019 | Obs | 287 | ||||||
Pa first | 356 | Pa last | 11.6 | P.A. Now (θ) | 11.6° | ||||||
Sep first | 4.1 | Sep last | 6.204 | Sep. Now (ρ) | 6.204" | ||||||
Mag pri | 7.54 | Mag sec | 8.20 | delta mag (ΔM) | 0.66 | Spectral class | K0 (yellow-orange) | ||||
Pri motion ra | +087 | Sec motion ra | +096 | ||||||||
Pri motion dec | +065 | Sec motion dec | +072 | ||||||||
Notes | N O (See Notes, Orbital solution) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 106466 | 20 46 13 +15 54 26 | WSI 110 Aa,Ab | 2021 | 7 | 343 | 0.0 | 7.90 | 8.90 | 1.00 | Y | ||
Show | OR Del | 106466 | 20 46 13 +15 54 26 | STF 2725 AB | 2019 | 287 | 12 | 6.2 | 7.54 | 8.20 | 0.66 | Y | <=== |
Var name | OR Del | Constellation | Delphinus | SAO | 106466 | HIP | 102490 | ||||
Tycho2 | 1634-03058-1 | Gaia DR2 | 1762987494080694016 | HD | 197913 | GC | 28953 | ||||
ADS | 14270 | BD | BD+15 4251 | Distance | 36.46 | Distance ly | 118.93 |
Period (P) | 2107.9177y | ± 759.8293 | Periastron (T) | 1703.6193y | ± 508.3354 | Semi-major axis (a) | 10.81181a | ± 5.3979 |
Eccentricity (e) | 0.94506 | ± 0.18354 | Inclination (i) | 65.666° | ± 18.971 | Longitude of periastron (ω) | 92.31° | ± 20.563 |
Node (Ω) | 129.316° | ± 103.149 | Notes | n | Reference | Izm2019 | ||
Equinox | Last observation | 2015 | Grade | 4 | (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 |
STF2725 | AB: H 2 66. | MEv2010 |
A premature orbit has been computed. |
refcode | metd | author | reference |
Izm2019 | orb u | Izmailov, I.S. | 2019AstL...45...30I |
Izm2019 | Ast. Lett. 45, 30, 2019 | ||
Izm2019 | (Orbital elements from weighted solutions used when available (Table 2), | ||
Izm2019 | unweighted elements (Table 1) used for remaining 29 systems.) | ||
MEv2010 | - | MacEvoy, B. | ................... |
MEv2010 | private communication, 2010 (see http://www.handprint.com/ASTRO/index.html) |
idgroup | discov | author |
1 | STF | Struve, F.G.W. |
34 | WSI | Douglass, G.G., Hindsley, R.B., & Worley, C.E. |
43 | WSI | Mason, B.D., Hartkopf, W.I., Holdenried, E.R., Rafferty, T.J., Wycoff, G.L., |
43 | WSI | Hennessy, G.S., Hall, D.M., Urban, S.E., et al. |
46 | WSI | Mason, B.D., Hartkopf, W.I., Wycoff, G.L., Holdenried, E.R., Platais, I., |
46 | WSI | Rafferty, T.J., Hall, D.M., Hennessy, G.S., et al. |
47 | WSI | Mason, B.D., Hartkopf, W.I., Urban, S.E., Wycoff, G.L., Pascu, D., Hall, D.M., |
47 | WSI | Hennessy, G.S., Platais, I., et al. |
48 | WSI | Mason, B.D., Hartkopf, W.I., Wycoff, G.L., Pascu, D., Urban, S.E., Hall, D.M., |
48 | WSI | Hennessy, G.S., Rafferty, T.J., et al. |
75 | WSI | Mason, B.D., Hartkopf, W.I., Bredthauer, G., Ferguson, E.W., Finch, C.T., Kilian, |
75 | WSI | C.M., Rafferty, T.J., Ragan, T.J. & Wieder, G.D. |
85 | WSI | Mason, B.D., Williams, S.J., Matson, R.A., Josties, J.D., Eakens, P.D., Justice, |
85 | WSI | M., Kilian, C.M. & Warner, R. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
20462+1554 | STF2725 | AB | 2009 | 245 | 11 | 6.1 | 7.54 | 8.20 | K0 | NOD | 204613.31+155426.4 |
20462+1554 | STF2725 | AB | 2010 | 250 | 11 | 6.1 | 7.54 | 8.20 | K0 | NOD | 204613.31+155426.4 |
20462+1554 | STF2725 | AB | 2011 | 254 | 11 | 5.9 | 7.54 | 8.20 | K0 | NOD | 204613.31+155426.4 |
20462+1554 | STF2725 | AB | 2013 | 260 | 12 | 6.1 | 7.54 | 8.20 | K0 | NOD | 204613.31+155426.4 |
20462+1554 | STF2725 | AB | 2015 | 264 | 11 | 6.4 | 7.54 | 8.20 | K0 | NO | 204613.31+155426.4 |
20462+1554 | STF2725 | AB | 2016 | 274 | 11 | 6.2 | 7.54 | 8.20 | K0 | NO | 204613.31+155426.4 |
20462+1554 | STF2725 | AB | 2017 | 276 | 12 | 6.2 | 7.54 | 8.20 | K0 | NO | 204613.31+155426.4 |
20462+1554 | STF2725 | AB | 2018 | 280 | 12 | 6.1 | 7.54 | 8.20 | K0 | NO | 204613.31+155426.4 |
20462+1554 | STF2725 | AB | 2019 | 285 | 12 | 6.2 | 7.54 | 8.20 | K0 | NO | 204613.31+155426.4 |
Show | date | username | difficulty | separation | pa_estim | interest | notes |
Show | 22/08/29 | daedalus1 | mean difficulty | separated | 12 | Very pretty. Seeing: Pickering 9, excellent. Measures: theta 012, rho 6.55 +/- 0.090 |
Show | date | username | difficulty | sep | sep_sigma | pa | pa_sigma | delta_mag | # | notes |
Show | 15/11/08 | g.locatelli | mean difficulty | 6.38 | 0.05 | 10.85 | 0.66 | 0.62 | 1 |
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