Zeta Herculis Moving Group is a set of star

Star

A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...

s that share a common motion through space

Stellar kinematics

Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects...

.

The existence of this moving group was first published in 1958 by Olin J. Eggen

Olin J. Eggen

Olin Jeuck Eggen was an American astronomer. Some sources incorrectly give his name as Olin Jenck Eggen.-Biography:...

. Based upon the high velocity motion of the star Zeta Herculis through space, he searched for stars that were following a similar velocity and direction. A total of 22 candidate members were identified. Among the group members he included β Hydri

Beta Hydri

Beta Hydri is a star in the constellation Hydrus. It is about 24.4 light years away from Earth. It is larger and slightly more massive than the Sun....

, ρ Persei

Rho Persei

Rho Persei is a star in the constellation Perseus. It has the traditional name Gorgonea Tertia.Rho Persei is a semiregular variable star of the μ Cephei type, whose apparent magnitude varies between 3.3 and 4.0 with periods of 50 days and 1100 days. It is of spectral class M4 and is approximately...

, η Reticuli, φ¹ Lupi, ζ Herculis and ε Octantis. He estimated the group velocity at 74.5 km/s. In 1970, Richard Woolley refined the list to ten stars, including φ² Pavonis

Phi2 Pavonis

Phi² Pavonis , also known as HD 196378, is a yellow-white dwarf star approximately 82 light-years away in the constellation of Pavo . It is evolving into a subgiant....

 and ζ¹/ζ² Reticuli

Zeta Reticuli

Zeta Reticuli is a binary star system located about away from Earth. It is located in the constellation Reticulum, and is visible to the unaided eye in very dark skies...

 as members of this cluster.

The parallel motion of the stars in this group implies a common origin, and hence a similar age and composition. The membership of ζ Herculis and HD 158614 came into question because their composition appeared to show they were much younger than other members of the group. The average age was estimated as , while ζ Herculis was estimated as 6.3 billion years in age. However, a statistical analysis of the metallicity

Metallicity

In astronomy and physical cosmology, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium...

 for stars in this group showed no difference from a comparison sample, indicating that it may not be possible to determine more information about this group based on the composition of its members.

Members of the ζ her moving group(1958 version)

Name	Constellation Constellation In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....	B Bayer designation A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name...	F Flamsteed designation Flamsteed designations for stars are similar to Bayer designations, except that they use numbers instead of Greek letters. Each star is assigned a number and the Latin genitive of the constellation it lies in...	HD Henry Draper Catalogue The Henry Draper Catalogue is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension , published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the...	HIP	vis. mag. Apparent magnitude The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...	Dist. (ly)	Sp. class Stellar classification In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...	Notes
ζ Her	Hercules Hercules (constellation) Hercules is a constellation named after Hercules, the Roman mythological hero adapted from the Greek hero Heracles. Hercules was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations today...	ζ	40	150680	81693	2.81	35	F9IV
β Hyi Beta Hydri Beta Hydri is a star in the constellation Hydrus. It is about 24.4 light years away from Earth. It is larger and slightly more massive than the Sun....	Hydrus Hydrus Hydrus is a small constellation in the southern sky, created in the sixteenth century. Its name means "male water snake", and it should not be confused with Hydra, a much larger constellation which represents a female water snake.-History:...	β		2151	2021	2.82	24	G2IV
ρ Per Rho Persei Rho Persei is a star in the constellation Perseus. It has the traditional name Gorgonea Tertia.Rho Persei is a semiregular variable star of the μ Cephei type, whose apparent magnitude varies between 3.3 and 4.0 with periods of 50 days and 1100 days. It is of spectral class M4 and is approximately...	Perseus Perseus (constellation) Perseus is a constellation in the northern sky, named after the Greek hero Perseus. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations defined by the International Astronomical Union...	ρ	25	19058	14354	3.32	325	M3IIIvar	Gorgonea Tertia
φ1 Lup	Lupus Lupus (constellation) Lupus is a constellation in the southern sky. Its name is Latin for wolf. Lupus was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations...	φ1	88	136422	75177	3.57	326	K5III
47 Psc	Pisces Pisces (constellation) Pisces is a constellation of the zodiac. Its name is the Latin plural for fish, and its symbol is . It lies between Aquarius to the west and Aries to the east...		47	2411	2219	5.01	490	M3IIIvar	TV Psc
ε Oct	Octans Octans Octans is a faint constellation the southern sky. Its name is Latin for the eighth part of a circle, but it is named after the octant, a navigational instrument. The constellation was devised by Nicolas Louis de Lacaille in the eighteenth century....	ε		210967	110256	5.09	268	M6III	BO Oct
η Ret	Reticulum Reticulum Reticulum is a small, faint constellation in the southern sky. Its name is Latin for a small net, or reticle—a net of crosshairs at the focus of a telescope eyepiece that is used to measure star positions...	η		28093	20384	5.24	380	G7III
84 Vir	Virgo Virgo (constellation) Virgo is one of the constellations of the zodiac. Its name is Latin for virgin, and its symbol is . Lying between Leo to the west and Libra to the east, it is the second largest constellation in the sky...		84	119425	66936	5.35	217	K1III
HD 71377	Puppis Puppis Puppis is a constellation in the southern sky. Its name is the Latin word for the poop deck of a ship, and Puppis represents the deck of the ship and its deckhouses...			71377	41395	5.52	268	K1/K2III
HD 43899	Columba Columba Saint Columba —also known as Colum Cille , Colm Cille , Calum Cille and Kolban or Kolbjørn —was a Gaelic Irish missionary monk who propagated Christianity among the Picts during the Early Medieval Period...			43899	29842	5.54	302	K2III
HD 100733 C1 Centauri C1 Centauri is a star in the constellation Centaurus. It is approximately 652 light years from Earth.C1 Centauri A is a M-type red giant with a mean apparent magnitude of +5.64. It is classified as a semiregular variable star and its brightness varies from magnitude +5.55 to +5.80 with a period...	Centaurus Centaurus Centaurus is a bright constellation in the southern sky. One of the largest constellations, Centaurus was included among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.-Stars:...	C1		100733	56518	5.64	652	M3III	V763 Cen
HD 150275	Ursa Minor Ursa Minor Ursa Minor , also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, whence the name Little Dipper...			150275	80850	6.35	408	K1III
29 LMi	Leo Minor Leo Minor Leo Minor is a small and faint constellation. Its name means "the smaller lion", in contrast to Leo, the larger lion. Its brightest stars form a rough triangle, and it lies between the larger and more recognizable Ursa Major and Leo...		29	90250	51047	6.49	413	K1III
HD 221354	Cassiopeia Cassiopeia (constellation) Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopea was one of the 48 constellations listed by the 2nd century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today...			221354	116085	6.76	55	K2V	Gliese 895.4
HD 9166	Cassiopeia Cassiopeia (constellation) Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopea was one of the 48 constellations listed by the 2nd century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today...			9166	7166	6.81	485	K3III
HD 30455	Taurus Taurus (constellation) Taurus is one of the constellations of the zodiac. Its name is a Latin word meaning 'bull', and its astrological symbol is a stylized bull's head:...			30455	22349	6.96	100	G2V...
71 Leo	Leo Leo (constellation) Leo is one of the constellations of the zodiac. Its name is Latin for lion. Its symbol is . Leo lies between dim Cancer to the west and Virgo to the east.-Stars:...		71	98824	55533	7.03	773	K1III
HD 219829	Cassiopeia Cassiopeia (constellation) Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopea was one of the 48 constellations listed by the 2nd century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today...			219829	115112	8.09	106	K0V...
HD 68788	Camelopardalis Camelopardalis Camelopardalis is a large but faint constellation in the northern sky. The constellation was introduced in 1612 by Petrus Plancius. Some older astronomy books give an alternative spelling of the name, Camelopardus.-Etymology:...			68788	40848	8.35	101	K1V
HD 209134	Pisces Austrinus			209134		9.11		K3V
HD 89668	Sextans Sextans Sextans is a minor equatorial constellation which was introduced in 1687 by Johannes Hevelius. Its name is Latin for the astronomical sextant, an instrument that Hevelius made frequent use of in his observations.-Notable features:...			89668	50657	9.42	106	F8V
HD 106364	Camelopardalis Camelopardalis Camelopardalis is a large but faint constellation in the northern sky. The constellation was introduced in 1612 by Petrus Plancius. Some older astronomy books give an alternative spelling of the name, Camelopardus.-Etymology:...			106364		10.03		K2III+...

Members of the ζ her moving group (1970 version)

Name	Constellation Constellation In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....	B Bayer designation A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name...	F Flamsteed designation Flamsteed designations for stars are similar to Bayer designations, except that they use numbers instead of Greek letters. Each star is assigned a number and the Latin genitive of the constellation it lies in...	HD Henry Draper Catalogue The Henry Draper Catalogue is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension , published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the...	HIP	vis. mag. Apparent magnitude The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...	Dist. (ly)	Sp. class Stellar classification In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...	Notes
ζ Her	Hercules Hercules (constellation) Hercules is a constellation named after Hercules, the Roman mythological hero adapted from the Greek hero Heracles. Hercules was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations today...	ζ	40	150680	81693	2.81	35	F9IV
β Hyi Beta Hydri Beta Hydri is a star in the constellation Hydrus. It is about 24.4 light years away from Earth. It is larger and slightly more massive than the Sun....	Hydrus Hydrus Hydrus is a small constellation in the southern sky, created in the sixteenth century. Its name means "male water snake", and it should not be confused with Hydra, a much larger constellation which represents a female water snake.-History:...	β		2151	2021	2.82	24	G2IV
φ2 Pav Phi2 Pavonis Phi² Pavonis , also known as HD 196378, is a yellow-white dwarf star approximately 82 light-years away in the constellation of Pavo . It is evolving into a subgiant....	Pavo Pavo Pavo may refer to:*The genus name for the peafowl*Pavo *Pavo, Georgia, town in the United States*The Spanish word for turkey....	φ2		196378	101983	5.11	79	F8V
ζ2 Ret Zeta Reticuli Zeta Reticuli is a binary star system located about away from Earth. It is located in the constellation Reticulum, and is visible to the unaided eye in very dark skies...	Reticulum Reticulum Reticulum is a small, faint constellation in the southern sky. Its name is Latin for a small net, or reticle—a net of crosshairs at the focus of a telescope eyepiece that is used to measure star positions...	ζ2		20807	15371	5.24	39	G1V
HD 158614 Gliese 678 Gliese 678 is a spectroscopic binary star system approximately 60 light-years away in the constellation of Ophiuchus.This system is in the Zeta Herculis moving group, which is of low metallicity stars, 5 billion years old...	Ophiuchus Ophiuchus Ophiuchus is a large constellation located around the celestial equator. Its name is from the Greek "serpent-bearer", and it is commonly represented as a man grasping the snake that is represented by the constellation Serpens. Ophiuchus was one of the 48 constellations listed by the 2nd-century...			158614	85667	5.31	54	G8IV-V	Gliese 678
ζ1 Ret Zeta Reticuli Zeta Reticuli is a binary star system located about away from Earth. It is located in the constellation Reticulum, and is visible to the unaided eye in very dark skies...	Reticulum Reticulum Reticulum is a small, faint constellation in the southern sky. Its name is Latin for a small net, or reticle—a net of crosshairs at the focus of a telescope eyepiece that is used to measure star positions...	ζ1		20766	15330	5.53	40	G2V
1 Hya	Hydra Hydra (constellation) Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees. It has a long history, having been included among the 48 constellations listed by the 2nd century astronomer Ptolemy. It is commonly represented as a water snake...		1	70958	41211	5.61	89	F3V
HD 14680	Fornax Fornax Fornax is a constellation in the southern sky. Its name is Latin for furnace. It was created in the 18th century and is now one of the 88 modern constellations.-History:Fornax was formed by Nicolas Louis de Lacaille in 1756...			14680	10977	8.79	100	F3V
HIP 59198	Virgo Virgo (constellation) Virgo is one of the constellations of the zodiac. Its name is Latin for virgin, and its symbol is . Lying between Leo to the west and Libra to the east, it is the second largest constellation in the sky...				59198	11.69	94	K7	Gliese 456