WDSTOOL

Research and list editing of visual double stars

20467+1607 - STF2727AB	Constellation : Del		AD 20h46min39.5sec / Dec +16°07min27.4sec
Components	Primary	Secondary	WDS data	WDS Notes
Magnitudes	4.36	5.03	Negleted : non	NNotes found in WDSNOT MEMO of WDS.,OOrbit, briefly described in WDSNOT MEMO and has entry in Orbit Catalog.,ZStatistically the same parallax within the errors would indicate the components are physical. have ascertained the mystery behind these pairs.
Proper Motion RA	-026	-001	Precise coordinates : oui	ORB6 Ephemeris 2025
Mouvement propre Dec	-196	-204	Spectre : K1IV+F7V	Grade:4 Theta:264.3 Rho:8.775

Nb of observations : 546	Angle	Separation	Cross references (wds id) I \| P
First measure : 1755	280	12.000	A: HIP 102532 / HD 197964 / SAO 106477 / HR 7948 / ADS 14279 / Bayer gam02 / UCAC4 531-135610
Last measure : 2022	265.60	8.840
			B: HIP 102531 / HD 197963 / SAO 106475 / HR 7947 / GC 28965 / ADS 14279 / Bayer gam01 / UCAC4 531-135608
Measurement history (InformationThis historical is indicative. It is incomplete and may contain errors. It is built as and when updates to WDSTOOL and does not take into account any subsequent modifications to WDS.)
2019	264.90	8.915	Plot, orbital elements and data Sixth Catalog of Orbits of Visual Binary Stars data. DateDate of the last observation used in the orbit calculation, if published. : 1993 \| GradeThe grade (to nearest integer), as previously discussed. : 4 PThe period (P), followed by code indicating units: "c" = centuries, "d" = days, "h" = hours, "m" = minutes, "y" = years. : 3249.000000 y \| aThe semi-major axis (a), followed by code indicating units: "a" = arcseconds, "m" = milliarcseconds, "u" = microarcseconds. : 10.22000 a \| iThe inclination (i), in degrees. : 148.7800 \| ΩThe node (Omega), in degrees. An identified ascending node is indicated by an asterisk following the value. : 88.0600 * \| TThe time of periastron passage (T), followed by code indicating units: "d" = Julian date, with first two digits truncated (i.e., JD-2400000), "m" = modified Julian date (JD-2400000.5), "y" = fractional Besselian year. : 2305.000000 y eThe eccentricity (e). : 0.880000 \| WThe longitude of periastron (w), in degrees, reckoned from the node as listed. : 331.1600 \| EquinoxEquinox, if any, to which the node refers. : 2000 system note Orbit note
2017	265.80	8.915
2016	265.90	8.990
2015	265.50	8.930
2013	266.00	9.000
2012	266.00	9.000
2012	278.00	9.400