Kai Siegbahn
Kai Siegbahn (born April 20, 1918, Lund, Sweden; died 2007), was a Swedish physicist. Siegbahn served as inspector at Östgöta nation. Siegbahn's honours include Nobel Prize in Physics, Sixten Heyman Award and Björkén Prize.
Kai Siegbahn’s zodiac sign was Aries, and in the Chinese zodiac they were an Earth Horse, with Life Path 7 in numerology.
Aries, and in the Chinese zodiac they were an 
Earth Horse, with 
Life Path 7 in numerology.How compatible are you with Kai Siegbahn?
Your birthday, just below, gives your match percentage with Kai. Under a minute.
Your AsterNym Match
?%Your score is waiting.
Two details and you have your number with Kai. Under a minute, and it is real astrology, not a quiz.
Your result includes:
- · Your compatibility percentage
- · What attracts you to each other
- · What you would bring to the match
- · Where you might clash
- · Whether you share lucky numbers, colours, stones or seasons
Kai Siegbahn’s AsterNym identity
The Radiant Visionary
Fire represents warmth, visibility and momentum. Fire-led charts are associated with enthusiasm, expression and the ability to encourage other people. Life Path 7 represents inquiry: study, solitude and the need to understand what others may simply accept.
Fire Day Master (BaZi) × cardinal Sun × Life Path 7, on the intuitive plane.
How common is the name Kai in the U.S.?
#93
US rank in 2025
~78,710
Americans share it since 1880
2022
its peak year
US Social Security Administration public records
Kai’s lucky numbers, colours and stones
Traditional correspondences calculated from AsterNym’s astrology, wuxing and numerology system.
Lucky numbers
7 · 2 · 3
Lucky colours
Yellow & Ochre
Lucky day
Tuesday
Direction
• Center
Season
the turning of seasons
Stones
Diamond, Red Coral, Citrine
Flower constellation
🌼 Daisy · 🌺 Red Dahlia · 🌼 Chrysanthemum
White · Crimson · Gold
The same wuxing & numerology correspondences as your own print. One tradition, read for everyone
What the chart says
Kai, according to the stars
Core essence
Kai leads with the body. First in, first to speak, first to say the thing everyone was thinking, and honestly a little surprised when the room needed a second to catch up. The core of Kai is courage that does not look like courage from the inside, it just looks like Tuesday. They would rather be wrong fast than right slowly, and it is why people follow them.
How Kai wants to be loved
Kai wants to be loved tenderly. Venus in Pisces is the romantic of the zodiac: soft, giving, a little dreamy, and easily bruised. They love without keeping score and need a partner who will not take advantage of that. Be gentle with Kai, be honest, and they will make the ordinary feel enchanted.
How Kai creates
How Kai makes things happen: they hold the flame steady. A Yin Fire day master is the candle, the lamp, the light that is close and personal rather than blazing. Kai creates intimacy, one room, one conversation, one person made to feel seen. Moody when the fuel runs low, magnetic when it does not.
Instinct
Instinct: Kai is free-spirited, a Horse year, and their gut reaction is to run toward the new thing. Energetic, warm, popular, honest to a fault, and impossible to keep indoors. The Earth year grounds it: practical, patient, someone people lean on.
Purpose
Purpose: Life Path 7 is the seeker. Kai is here to understand, to go deep rather than wide, to keep a private inner world that most people never see. Thoughtful, intuitive, happiest with time alone, and learning to let the right people in.
Triggers
Triggers: sloppiness, and being told they are overthinking it. Mars in Virgo means Kai channels energy into fixing, sorting, getting it right, and gets sharp when others do not care. The critic turns inward first. Give them a problem worth solving and watch them come alive.
Computed from Kai's birth date, not guessed. The full working is below.
Where Kai sits
Six lines. Tap where you sit on each.
Kai’s dot is placed from the chart. Yours is wherever you put it.
You may draw energy from a wide network, many doors, lightly held.
You may leap first and adjust as you go. Waiting can feel like losing momentum.
You may wear your feelings openly. What you feel tends to show.
You may want to resolve tension the moment it appears, rather than let it sit.
You may be drawn to big possibilities. The practical follows after the vision.
You may feel connection fast. Chemistry can arrive before the details do.
Tap each line where you sit.
All twelve of yours, from your birth date →✦ A real star from their birth night
Dedicate a star to Kai Siegbahn
Three stars chosen from the real sky above Lund on the night they were born. Choose the story that connects you.
No public birth time is available, so this is a 9:00 p.m. reference evening sky for that date and place. It is connected to the night of birth; it is not the sky at the birth minute, and no other reading on this page uses that time. Dedications are commemorative AsterNym records and do not rename or confer ownership of stars.
If you only read one paragraph
Aries Sun
Aries SunStarts the thing. Then plans it.
Kai Siegbahn's Sun was in Aries for the whole of April 20, 1918, so no birth time is needed to settle it. Traditional Aries readings associate the sign with initiative, directness and a preference for acting before the plan is finished. Astrologers describe it as the cardinal fire sign: the one that starts things. The corresponding tension is impatience, with the classical caution that what Aries begins quickly it may leave for someone else to complete.
Earth Horse
Earth HorseHappiest halfway there.
Kai Siegbahn was born on April 20, 1918, which falls in a Earth Horse year of the Chinese calendar. Traditional Horse readings emphasise energy, independence and movement: a sign happiest with somewhere to go and impatient with fences. The Chinese almanacs describe the Horse as sociable, quick and difficult to keep in one place. The corresponding caution in the tradition is inconstancy, and the habit of leaving before the work of staying has begun.
Life Path 7
Life Path 7Needs the quiet to work.
Kai Siegbahn's birth date, April 20, 1918, reduces to Life Path 7 under the numerology method AsterNym uses. Traditional Life Path 7 readings associate the number with inquiry, analysis and solitude: the need to understand what others simply accept. Numerologists describe it as the path of the seeker, reflective and private. The corresponding tension is withdrawal, with the caution that a mind at home in its own company can forget to come out.
What stands out in Kai’s chart
- The tightest major aspect in Kai Siegbahn's date-only chart is Venus opposition Mars, with an orb of under 1°.
- Five of the ten planets fall in Fixed signs, making Fixed the strongest modality in this chart.
- Kai Siegbahn combines a Fire Day Master in BaZi with a cardinal Sun and a Life Path on the intuitive plane, the combination AsterNym calls The Radiant Visionary.
Kai’s birth chart
Reference chart · birth time unknown
No documented birth time exists for Kai Siegbahn, so the positions below are checked across the whole birth date, not fixed at noon. The Moon ranges from 18° to 0° Leo or Virgo depending on the hour. The wheel's houses are a solar chart, counted from the Sun's sign, because the Ascendant needs a time.
No birth time, so the houses are a solar chart: the Sun’s sign counts as house 1. A documented time would place them from the Ascendant instead.
Placements
Tap one to light it on the wheel.
The working: aspects, Chiron and the asteroids, dominant planets and configurationsshow
Aspects across every possible birth time
Stable aspects hold for any birth hour. Possible ones depend on the hour, so their orb is a range rather than a number. Orb policy western_v1.
stableVenusoppositionMars0.2° to 1.3° orb
Kai’s affections pull against their drive from across the wheel.
stableVenussquareJupiter1.6° to 2.3° orb
Kai’s affections grind against their growth.
stableMercurysquareSaturn1.8° to 2.2° orb
Kai’s mind grinds against their discipline.
stableSunsextileUranus2.1° to 3.0° orb
Kai’s core identity opens doors for their need for freedom.
stableMarssquareJupiter2.6° to 2.9° orb
Kai’s drive grinds against their growth. The friction is lifelong. Worked with, it builds real strength.
stableMercurysextileVenus2.9° to 4.2° orb
Kai’s mind opens doors for their affections. An easy alliance, and it pays off when it is used.
stableSaturnconjunctionNeptune3.4° orb
Kai’s discipline and imagination act as one. Each makes the other louder.
stableJupitersextileSaturn3.5° to 3.7° orb
Kai’s growth opens doors for their discipline. An easy alliance, and it pays off when it is used.
stableSunsextilePluto3.7° to 4.6° orb
Kai’s core identity opens doors for their depths. Nothing happens until someone makes the first move.
stableMercurytrineMars4.2° to 4.4° orb
Kai’s mind flows straight into their drive. Effortless, which is exactly why it gets taken for granted.
stableSunsquareNeptune4.3° to 5.3° orb
Kai’s core identity grinds against their imagination. The angle that irritates, and the one that teaches.
stableMercurysquareNeptune5.2° to 5.6° orb
Kai’s mind grinds against their imagination.
Chart signature
Elements
- Fire4 of 10
- Earth2 of 10
- Air2 of 10
- Water2 of 10
Modalities
- Cardinal2 of 10
- Fixed5 of 10
- Mutable3 of 10
Counted across the ten planets by sign: Fire leads this chart.
Kai’s Chiron, Ceres, Eros, Hygiea and Lilith
Four minor bodies and the mean lunar apogee, placed in the same tropical zodiac as the planets above. None of these feed the chart signature, the rarity score or any ranking on this site: they are listed for readers who use them. Chiron, Ceres, Eros and Hygiea positions come from JPL Horizons; Black Moon Lilith is the mean apogee, the point most published Lilith tables use. The readings are the modern tradition’s, not AsterNym’s. Without a birth time the degree is the noon value and the day's movement is shown alongside it.
⚷ ChironAries 1°08′ (moves 0.05° over the day)
centaur (2060) · the wound and what is learnt from it
Chiron in Aries is read as a sore spot around asserting oneself: Kai may have learnt early that going first costs something, and built a way of leading that does not need permission.
⚳ CeresCapricorn 9°11′ (moves 0.09° over the day)
dwarf planet (1) · how a person nurtures and wants to be nurtured
Ceres in Capricorn is read as nurture through structure and provision. The reading has Kai caring by building something that lasts for others.
♡ ErosAries 18°17′ (moves 0.71° over the day)
near-Earth asteroid (433) · what draws them and how they desire
Eros in Aries is read as desire that moves first and asks later. Kai is read as drawn to the chase more than the catch.
⚕ HygieaPisces 29°36′ (moves 0.33° over the day)
main-belt asteroid (10) · health, routine and what keeps them well
Hygiea in Pisces is read as health that rises and falls with what is absorbed from others. The reading has Kai needing solitude to reset.
⚸ Black Moon LilithVirgo 28°57′ (moves 0.11° over the day)
mean lunar apogee · the part that refuses to be tamed
Black Moon Lilith in Virgo is read as a refusal of the standard of good enough, turned both outward and inward. The modern reading has Kai exacting with themselves first.
Aspects to the asteroids and Lilith
Major aspects only, at a tight 3° orb. The Moon is left out because its position moves 13° across an untimed day.
- Ceres trine Mercury 0.6°
- Chiron square Pluto 2.5°
Method: JPL Horizons heliocentric vectors, 1700–2100, cubic Hermite interpolation; geocentric, true ecliptic of date, tropical; geometric (no light-time or aberration); Lilith = mean lunar apogee (Chapront/Meeus mean perigee + 180°).
Kai’s dominant planets
Scored from rulerships, dispositors and aspect count. Without a birth time there is no Ascendant or house to score, and the Moon's sign is left out where it could change with the hour.
1. ♂ Mars7 pts
rules the Sun sign, Aries; disposes Sun; 3 major aspects
2. ☿ Mercury6 pts
disposes Mars, Jupiter; 4 major aspects
3. ☉ Sun5 pts
disposes Saturn, Neptune; 3 major aspects
A Mars-led chart is read as drive setting the pace: Kai is read as acting first and reflecting after.
How the score is built
- Rules the Sun sign, Moon sign or Ascendant sign: 3 points each (traditional co-rulers of Scorpio, Aquarius and Pisces score half).
- Sits in a sign it rules: 2 points.
- Disposes another planet (that planet sits in a sign it rules): 1 point each.
- Angular: 2 points in the first or tenth house, 1 point in the fourth or seventh (timed births only).
- Every major aspect it makes: 1 point.
Dominance scoring is an AsterNym method. Other sites weight differently and can name a different leader for the same chart.
Configurations in Kai’s chart
Closed shapes among the ten planets under the site’s one aspect-orb policy. The Moon is excluded without a birth time, so a shape that needs it is not claimed.
T-square onto Jupiter · Venus, Mars, JupiterAn opposition with a third planet squaring both ends. Read as a driving tension that resolves through the apex planet.
Minor aspects
semi-sextile 30° (orb 2°), semi-square 45° (orb 2°), quintile 72° (orb 1.5°), sesquiquadrate 135° (orb 2°), biquintile 144° (orb 1.5°), quincunx 150° (orb 2.5°). Pairs already in a major aspect are not repeated. Moon excluded without a birth time.
- Sun sesquiquadrate Mars 0.5°
- Venus biquintile Saturn 0.5°
- Neptune semi-sextile Pluto 0.7°
- Mercury quintile Uranus 0.8°
- Sun semi-square Venus 1.2°
- Mercury semi-sextile Jupiter 1.6°
Houses need a birth time. None is documented for Kai Siegbahn, so no house placements are claimed for the planets or the minor bodies above.
Kai’s family here
One relative of Kai Siegbahn also has a chart on AsterNym.
More people like Kai
Other physicists
Born in Sweden
- Ingrid BergmanSwedish actress
- Halvar BjörkSwedish actor
- Ulf von EulerSwedish physiologist and pharmacologist
- Anita EkbergSwedish actress
- Marianne AminoffSwedish actress
- Torsten Nils WieselSwedish neuroscientist
More charts like Kai’s
Fellow Aries suns
- Dario FoItalian actor, playwright, comedian, singer-songwriter, theater director, painter, and political activist
- Adolf ButenandtGerman biochemist
- John VaneEnglish pharmacologist
Born in Horse years
- Derek BartonEnglish organic chemist
- Didier QuelozSwiss astronomer
- Bertram BrockhouseCanadian physicist
Also born on April 20
- Jessica Lange1949
- Miranda Kerr1983
- Carmen Electra1972
- Paul Poiret1879
- Andy Serkis1964
- Tan France1983
Fellow Yin Fire day masters
- Paul ZindelAmerican dramatist and children's writer
- Abe BurrowsAmerican dramatist and playwright
- Art Buchwaldjournalist, humorist, United States Marine
Other Aries Horse charts
- Sadie SinkAmerican actress
- Sam WaltonAmerican businessman
- Skai JacksonAmerican actress
- Dolores HuertaAmerican labor leader
Other Radiant Visionarys
- Jan Paul van HeckeDutch association football player
- Steve KapuadiFrench footballer
- Eren ElmalıTurkish association football player (born 2000)
- Sondre LangåsNorwegian footballer (born 2001)
Famous people with Life Path 7
- Jalen ThompsonAmerican football safety
- Derion KendrickAmerican football cornerback
- Dayo OdeyingboAmerican football player
From the journal: Your Kua number, and why it splits households · Do twins have the same birth chart?
Kai’s cards
Every card is computed from April 20, 1918, none chosen. Tap one to flip it.
♂ Ruled by Mars
Iron Fe
Tap to flip
The working: BaZi pillarsshow
BaZi pillars
Day Master: yin Fire.
Year
戊
yang Earth
午
Horse
Fire
roots & early life
Month
丙
yang Fire
辰
Dragon
Earth
work & drive
Day
day master
丁
yin Fire
酉
Rooster
Metal
you & partnership
No birth time is on public record for Kai Siegbahn, so this chart has three pillars rather than four. The hour pillar, the rising sign and the birth-sky star all need a time, and we would rather leave them out than invent one.
Where this data comes from
Kai’s birth date and birthplace come from Wikidata Q192712, released under CC0, as do the occupations, works, teams and awards in the biography above. No documented birth time is available, so this chart is rated X on the Rodden scale, the astrological convention for how well evidenced a birth time is. Time-dependent results use a clearly labelled reference time and should not be read as their exact birth chart. Entries are matched to Wikidata by entity id rather than by name, kept only at day precision, and dropped where sources disagree on the date.
Portrait by Jan Collsiöö, CC BY-SA 3.0 nl, via Wikimedia Commons.
The same Kai Siegbahn at Wikipedia.
Roster last reviewed September 10, 2026. Every entry is checked against its Wikidata record; where a person shares a name with someone else, the entity id is what settles which of them this is. What we will not tell you sets out the claims this site refuses to make.
These are traditional interpretations, not facts or predictions. AsterNym is not affiliated with or endorsed by Kai Siegbahn.
Quick answers about Kai Siegbahn’s chart
- What zodiac sign was Kai Siegbahn?
- Kai Siegbahn was an Aries: born April 20, 1918, which puts the Sun in Aries for the whole of that day. That is the Western star sign. In the Chinese zodiac they were an Earth Horse.
- What was Kai Siegbahn's Chinese zodiac animal?
- The Horse, with the Earth element, from the Chinese lunar year of the April 20, 1918 birth.
- What time was Kai Siegbahn born?
- No reliably documented birth time is public, so AsterNym does not calculate an Ascendant. This chart uses date-only positions: the wheel shows a reference solar chart (the Sun's sign as house 1), and the Ascendant is left uncomputed instead of guessed from an unverified time.
- What was Kai Siegbahn's Life Path number?
- Life Path 7, calculated in numerology from the April 20, 1918 birth date.
- What was Kai Siegbahn's Chiron sign?
- Chiron in Aries at 1°. Position from JPL Horizons for the April 20, 1918 birth date.
- Where was Kai Siegbahn's Black Moon Lilith?
- Mean Black Moon Lilith in Virgo at 28°. This is the mean lunar apogee; the osculating Lilith some tables use can sit up to 30° away.
- What was Kai Siegbahn's dominant planet?
- Mars, on AsterNym's dominance score (7 points: rules the Sun sign, Aries; disposes Sun; 3 major aspects). Mercury is second and Sun third. Other sites weight rulerships and aspects differently and can name a different leader.
More charts to explore
Henry Way KendallAmerican particle physicist who won the Nobel Prize in Physics
Maurice WilkinsNew Zealand-born English physicist and biologist
Rita Levi-MontalciniItalian neurologist
Arthur Leonard SchawlowAmerican physicist
Booth TarkingtonAmerican novelist
Hamlin GarlandAmerican novelist, poet, essayist, short story writer