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{{DISPLAYTITLE:Alkhiba, al-Ḫibāʾ (الخباء)}}

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'''Alkhiba''' (Arabic: الخباء, ''al-Ḫibāʾ'', "the small tent") is an asterism of four stars forming a quadrilateral shape in the constellation Hercules. Its name is Arabic and is reported by both astronomers and ''anwāʾ'' authors of the 9th and 10th century.

== Etymology ==

Headword (Arabic): الخِبَاء  
Transliteration: ''al-Ḫibāʾ''  
IPA: /al.xɪ.baːʔ/

''Alkhiba'' (Arabic: الخباء, from the Arabic root خبي) denotes a small tent.

Lisān al-ʿArab defines ''al-Ḫibāʾ'' as:<ref>Lisān al-ʿarab, لسان العرب، باب الواو والياء المعتل فصل الخاء المعجمة</ref>

: الخِباءُ مِنَ الأَبنية: وَاحِدُ الأَخْبية، وَهُوَ مَا كَانَ مِنْ وَبَر أَو صُوفٍ وَلَا يَكُونُ مِنْ شَعَر، وَهُوَ عَلَى عَمُودَيْنِ أَو ثَلَاثَةٍ، وَمَا فوقَ ذَلِكَ فَهُوَ بَيْت.

''Al-Ḫibāʾ'' (الخِبَاء) is a tent made of camel wool or sheep’s wool, never of goat hair. It usually stands on two or three poles; anything larger than that is called a ''bayt'' (large tent).

== Concordance ==

''Alkhiba'' is an asterism of the quadrilateral ζ, ε, π, η Her corresponding exactly to the stars of the Hercules Keystone. It should not be confused with another similar asterism carrying the same name in the constellation Corvus, formed by γ, ε, β, δ, distinguished by Ibn Qutayba as the ''Southern Tent'' (Arabic: الخباء اليماني, ''al-Ḫibāʾ al-Yamānī''). Therefore, it is recommended to refer to the asterism in Hercules as the ''Northern Tent'' (Arabic: الخباء الشآمي, ''al-Ḫibāʾ ash-Šāmī'').

== History ==

Three primary sources discuss the Arabic Northern Tent (الخِبَاء الشآمي, ''al-Ḫibāʾ ash-Šāmī''): Ibn Qutayba, al-Marzūqī, and al-Ṣūfī. Their accounts differ, and to elucidate the significance of ''al-Ḫibāʾ'', one must compare it to other distinctly named stellar configurations that bear analogous nomenclature.

To understand how the Arabs imagined ''al-Ḫibāʾ'', we can look at two well defined ''Ḫibāʾ'' asterisms at our disposal. The first is ''al-Ḫibāʾ al-Yamānī'' (Arabic: الخباء اليماني, "the Southern Tent"), which corresponds to an asterism of four quadrilateral stars γ, ε, β, δ in Corvus.
<gallery widths="360" heights="360">
File:Southern Tent.jpg|Southern Tent (الخباء اليماني), alḪibāʾ alYamānī in Corvus.
File:Khiba ai generated.png|Arabian Khiba tent. image inspired by [https://tile.loc.gov/storage-services/service/pnp/matpc/01100/01108v.jpg a century old photo in Matson collection in Library of Congress].
</gallery>
The other is ''Saʿd al-Aḫbiya'' (سعد الأَخْبِيَة), an asterism of four stars in Aquarius: three form a triangle, which is ''al-Ḫibāʾ'' (the tent), and the fourth star inside the triangle is ''Saʿd'' (a man inside the tent). This description is given by Ibn Qutayba, al-Marzūqī, and al-Ṣūfī. Al-Ṣūfī said:<ref>[https://drive.google.com/drive/folders/1s6JXzftwjMQ5rgZoGE3718EtBLBZtjzr Book of the stars by al-Ṣūfī (died 986): Critical edition with commentary by Khalid al-Ajaji, digital edition, 2021]<br>

 [https://drive.google.com/drive/folders/1s6JXzftwjMQ5rgZoGE3718EtBLBZtjzr كتاب الكواكب لأبي الحسين عبد الرحمن بن عمر الرازي المعروف بالصوفي (291-376)، تحقيق خالد بن عبد الله العجاجي]
</ref>

: سَعْدَ الأَخْبِيَةِ، وهو المنزل الخامس والعشرون من منازل القمر، سُمِّيَ بهذا الاسم لأنه من أربعة كواكب: ثلاثة منها على مثلث، وواحد في وسط المثلث وهو الحادي عشر، فجعلوا هذا الواحد سعدًا والثلاثة له بمنزلة الخباء.
''Saʿd al-Aḫbiya'' ("Saad of the Tents"), the twenty-fifth of the lunar stations, was given this name because it consists of four stars: three form a triangle, and one lies at the center of that triangle — the eleventh star of Aquarius. They considered the central one ''Saʿd'', and the three surrounding it like the tent that shelters Saʿd.
<gallery widths="360" heights="360">
File:Saad alakhbiya.jpg|Saʿd al-AḪbiya, in Aquarius.
File:Khiba-triangular ai generated.png|Arabian Khiba tent supported by one pole. image inspired by [https://www.loc.gov/resource/matpc.04679/ a century old photo in Matson collection in Library of Congress]
</gallery>

=== Ibn Qutayba (d. 276 H / 889) ===
The complete text describing the Northern Tent (''al-Ḫibāʾ ash-Šāmī'') reads:<ref>أبو محمد عبد الله بن مسلم ابن قتيبة الدينوري (توفي 276 هـ)، كتاب الأنواء في مواسم العرب، دائرة المعارف العثمانية، حيدر أباد، الهند، 1375 هـ<br>
Ibn Qutayba al-Dīnawarī, Abū Muḥammad ʿAbdallah b. Muslim. 1956. ''Kitāb al-anwāʾ (fī mawāsim al-ʿArab)''. Hyderabad: Maṭbaʿat Majlis Dāʾirat al-Maʿārif al-ʿUthmāniyya.</ref>

;Original Arabic

وأولاد الظباء كواكب صغار، فيما بين الظباء والنفزات، وعن يمين نفزات الظباء كواكب مستديرة غير متقارنة، تسمّى: الحوض. والخباء أسفل من الحوض، كواكب في مثل هيئة الخباء اليمانية.

;English translation

The fawns, ''awlād al-Ẓibāʾ'' (أَوْلادُ الظِّبَاءِ), are small stars located between ''al-Ẓibāʾ'' (الظِّبَاءِ) and the Gazelle Leaps (النَّفَزَاتِ). To the right of the Gazelle Leaps (نَفَزَاتِ الظِّبَاءِ), there are round, non-aligned stars called ''al-Ḥawḍ'' (الحَوْضَ, "the Pool").

Below ''al-Ḥawḍ'' lies ''al-Ḫibāʾ'' (الخِبَاءُ, "the Tent"), a group of stars shaped like the southern tent (الخِبَاءِ اليَمَانِيَّةِ).

==== Stars identification ====

It appears that ''al-Ḫibāʾ'' (الخِبَاءُ), as described by Ibn Qutayba, denotes a quadrilateral configuration of four stars, reflecting the form of the southern tent (''al-Ḫibāʾ al-Yamānīyah'', الخِبَاءِ اليَمَانِيَّةِ). Two such arrangements meet this criterion: one located beneath ''al-Ḥawḍ'' at its rising, and another beneath ''al-Ḥawḍ'' at its setting. The first consists of the four stars of the Big Dipper, which may be discounted since these are well known stars, and Ibn Qutayba would likely have acknowledged this alternate designation. The other candidate is the quadrilateral formed by 15 Lyn, δ Aur, and α, β Cam.
<gallery widths="360" heights="360">
File:Northern Khiba ibn Qutayba.jpg|Al-Ḫibāʾ as described by ibn Qutayba.
</gallery>

=== Al-Ṣūfī (d. 376 H / 986) ===
The complete text describing the Northern Tent (''al-Ḫibāʾ ash-Šāmī'') reads:<ref>[https://drive.google.com/drive/folders/1s6JXzftwjMQ5rgZoGE3718EtBLBZtjzr Book of the stars by al-Ṣūfī (died 986): Critical edition with commentary by Khalid al-Ajaji, digital edition, 2021]]<br>

 [https://drive.google.com/drive/folders/1s6JXzftwjMQ5rgZoGE3718EtBLBZtjzr كتاب الكواكب لأبي الحسين عبد الرحمن بن عمر الرازي المعروف بالصوفي (291-376)، تحقيق خالد بن عبد الله العجاجي]
</ref>

;Original Arabic

وفي القطعة من السماء التي حواليها هذه الصورة ورأس الدب الأكبر والجَدْيُ وكوكبة ذات الكرسي، وهي رقعة من السماء شبه مفازة ليس فيها كوكب نيِّر ولا شيء من الكواكب المرصودة إلا الاثنين اللذين على الرأس من هذه الصورة، وفيها من الكواكب ما لا يمكن إحصاؤه لكثرته وكثافة جمعه، وفي الوسط منها، كواكب من القدر الخامس والسادس، تُسَمِّيها العرب: الخِبَاءَ؛ لأنّها على صورة الخباء، والاثنان اللذان على الرأس من هذه الصورة داخلان في جملة الخباء.

;English translation

In the region of the sky surrounded by this constellation (referring to the constellation of Auriga), along with the head of the Great Bear, Polaris, and the constellation Cassiopeia, there is an area with no bright star, nor any reported by Ptolemy except for the two at the head of Auriga. This area contains countless stars, densely packed together. In its center are stars of fifth and sixth magnitude, which the Arabs call ''al-Ḫibāʾ'' (الخِبَاءُ, "the Tent") because they resemble the shape of a tent. The two stars at the head of this constellation are considered part of ''al-Ḫibāʾ''.

==== Stars identification ====

It is evident from the description that ''al-Ḫibāʾ'' (الخِبَاء) refers to a region of the sky encompassing numerous stars, including the two on the head of Auriga, δ and ξ Aur. Restricting the definition to only a specific number of stars does not align with the account given by al-Ṣūfī.
<gallery widths="360" heights="360">
File:Northern Khiba al-sufi.jpg|Al-Ḫibāʾ region as described by al-Ṣūfī.
</gallery>

=== Al-Marzūqī (d. 421 H / 1030) ===
The complete text describing the Northern Tent (''al-Ḫibāʾ ash-Šāmī'') on the authority of Ibn al-Aʿrabī (d. 230 H / 845) reads:<ref>Al-Marzūqī, Abū ʿAli Aḥmad b. Muḥammad b. al-Ḥassan (died 1030), Al-Azminah wa al-amkinah (Times and Places), Edition by Dr. Mohammad Nayef al-Dulaymi, (Arabic print of the original book in 2002, World of Books, Beirut, Lebanon)<br>

الإمام أبو علي أحمد بن محمد بن الحسن المرزوقي (توفي سنة 421 هـ)، الأزمنة والأمكنة، تحقيق د. محمد نايف الدليمي، عالم الكتب، بيروت، لبنان، 1422 هـ.
</ref>

;Original Arabic

وقال [ابن الأعرابي]: أسفل من بَنَاتِ نَعْشٍ كواكب كثيرة مختلطة يقال لها: الضِّبَاعُ. وأَوْلَادُ الضِّبَاعِ كواكب صغار، عن يمين الضِّبَاعِ، بينها وبين بَنَاتِ نَعْشٍ. قال: والخِبَاءُ كواكب في مثل هيئة الخِبَاءِ، أسفل من أَوْلَادِ الضِّبَاعِ.

;English translation

[Ibn al-Aʿrabī] said: Below ''Banāt Naʿsh'' (بَنَاتِ نَعْش) are numerous, scattered stars called ''al-Ḍibāʿ'' (الضِّبَاعُ, "the hyenas"). ''Awlād al-Ḍibāʿ'' (أَوْلَادُ الضِّبَاعِ, "the young hyenas") are small stars located to the right of ''al-Ḍibāʿ'', between them and ''Banāt Naʿsh''. He also said: ''al-Ḫibāʾ'' (الخِبَاءُ) is a group of stars resembling the shape of a tent, situated below ''Awlād al-Ḍibāʿ'' (أَوْلَادُ الضِّبَاعِ, "the young hyenas").

==== Stars identification ====

Al-Marzūqī places ''al-Ḫibāʾ'' in spatial relation below ''al-Ḍibāʿ''. From the text we can easily find a quadrilateral shape with relatively bright stars as described in the region of the constellation Hercules. The location of this tent fits nicely with the nearby shepherd with his goats and two dogs in the middle of a desert pasture. Notably, his description is clearer than those of Ibn Qutayba and al-Ṣūfī and corresponds well with the arrangement of stars in the night sky. According to his narrative, ''al-Ḫibāʾ'' refers to the four stars ζ, ε, π, η Her.
<gallery widths="360" heights="360">
File:Northern Khiba al-Marzuqi.jpg|Al-Ḫibāʾ as described by al-Marzūqī.
</gallery>
== Summary of stars identification ==
{| class="wikitable"
|+ 
|-
! Author !! Identification !! Comment
|-
| Ibn Qutayba || The quadrilateral formed by 15 Lyn, δ Aur, and α, β Cam || This is the closest match of the description, but the asterism stars are not prominent. 
|-
| Al-Ṣūfī || A region of the sky surrounded by Auriga, along with the head of the Great Bear, Polaris, and  Cassiopeia, including the two stars δ and ξ Aur. || A region with no bright stars, and no prominent asterism resembling a khiba.
|-
| Al-Marzūqī || ζ, ε, π, η Her || Definitive identification from a clear description
|}
== Adopted identification ==

Based on the concordance of star positions and the historical descriptions, al-Marzūqī account is adopted for '''al-Ḫibāʾ in Hercules (Northern Tent)''' as the preferred identification. In this article, ''al-Ḫibāʾ ash-Šāmī'' denotes the quadrilateral ζ, ε, π, η Her, corresponding to the Hercules Keystone, and is distinguished from ''al-Ḫibāʾ al-Yamānī'' in Corvus.
== Reference ==

[[Category:Asterism]] [[Category:Constellation]] [[Category:Her]] [[Category:Arabic]] [[Category:West Asian]] [[Category:Asian]] [[Category:North Africa]] [[Category:Africa]]