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Historic Site · Altadena
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Horace Babcock’s Altadena

The co-inventor of the solar magnetograph lived here, but the home’s post-Eaton condition still needs verification.
Context-only story
Private residence or private residential area. The public point is deliberately coarse; do not route to, approach, or photograph a home.
The location shown is deliberately coarse or withheld. It must not be used to identify a private property.
Directions unavailable
STATUS
Status unknown
ACCESS
No public access
PUBLIC LOCATION
Minoru Drive area (approximate)
MAP PRECISION
Approximate area
EVIDENCE
Good working evidence
CHECKED
Aug 22, 2026
THE NERD PAYOFF

Why This Pin Earned Its Place

Babcock’s node links instrument-building at the Hale Solar Laboratory to the magnetic Sun, Mount Wilson, Palomar, and a father-son scientific partnership.
01
Documented 1953–1956 home
02
Solar magnetograph network
03
Post-fire lifecycle unresolved
PEOPLE AND IDEAS HERE

The Human Network Behind the Address

The pre-fire parcel was a private 1937 residence, but absence from the Eaton inspection layer is not proof of no damage; current condition remains unknown.
Horace W. Babcock
1912–2003
resident · Documented 1953–1956
Caltech directories place Babcock at the Altadena residence.
Interaction circle
• Horace and Harold Babcock built the first solar magnetograph at Hale Solar Laboratory in 1952.
• The instrument story connects Hale, Mount Wilson, and Palomar.
LOOK CLOSER

The Gloriously Specific Details

Location history
• The pre-fire parcel was a private 1937 residence, but absence from the Eaton inspection layer is not proof of no damage; current condition remains unknown.
Interaction circle
• Horace and Harold Babcock built the first solar magnetograph at Hale Solar Laboratory in 1952.
• The instrument story connects Hale, Mount Wilson, and Palomar.
Map disclosure
• The marker is a coarse area point, not the residence or parcel.
CONFIRMED · HISTORICAL ASSOCIATION
The pre-fire parcel was a private 1937 residence, but absence from the Eaton inspection layer is not proof of no damage; current condition remains unknown.
INTERPRETATION · IDEA NETWORK
Babcock’s node links instrument-building at the Hale Solar Laboratory to the magnetic Sun, Mount Wilson, Palomar, and a father-son scientific partnership.
UNDERSTAND THE PLACE

Context Without a Doorstep

Public location
Minoru Drive area (approximate)
Hours
Not applicable to a context-only record. A related public institution may have its own event schedule.
Access
Private residence or private residential area. The public point is deliberately coarse; do not route to, approach, or photograph a home.
Map disclosure
The marker identifies a general area, not a house or parcel.
Photography
Do not photograph residents, windows, or private property, and do not linger.
Read the primary research source ↗
ACCESSIBILITY
Details need a check
Unknown, and not assessed as a visitor destination because public access is unavailable or the site is sensitive.
ACCESS & SAFETY
Specific, not sensational
No trespass, doorstep visits, address hunting, or attempts to refine the approximate marker. Learn from the public story instead.
TRUST & SOURCES
usable
Every visible claim is connected to a source and review date. Unknown never silently means no.
Caltech 1955–56 directory ↗
Checked Aug 22, 2026
National Park Service — Hale Solar Laboratory ↗
Checked Aug 22, 2026
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