Holmdel Horn Antenna
Holmdel Horn Antenna is an attraction in New Jersey, at a modelled elevation of 107 m. Second Watchung Mountain stands 168 m to the northwest, 24 miles off. The nearest named place is Crawford Hill, a peak 0.1 miles away. Upper Freehold Historic Farmland Byway passes 21 miles off. 33 named summits stand within 25 miles.
At this site in 1964, Arno Penzias and Robert Wilson used this horn-shaped radio antenna and detected cosmic microwave background radiation, a significant discovery supporting the Big Bang theory.
The story
microwave horn antenna in New Jersey, US
Wikidata Q5883312, referenced by the OpenStreetMap record.
What the record says
- Built
- 1959
How to reach it
- 20.5 mi off the Upper Freehold Historic Farmland Byway
- 21.1 mi off the Millstone Valley Scenic Byway, National
Named places within 25 miles
- Vietnam Veterans Memorial: 0.5 mi
- The South Pole: 8.1 mi
- First School Bell Sayreville, NJ: 10.3 mi
- Sayre & Fisher Reading Room: 10.5 mi
- Sayre & Fisher Brick Water Tower: 10.7 mi
- Vietnam Era Museum and Education Center: 0.5 mi
- Holmes Hendrickson House: 1.2 mi
- Longstreet Farm Vistior Center & Farm Entrance: 1.5 mi
- Burrowes Mansion Museum: 2.9 mi
- Keyport Fire Museum and Education Center: 3.3 mi
- Telegraph Hill Park: 0.7 mi
- Veterans Memorial Park: 0.8 mi
- Holmdel County Park: 0.9 mi
- Ackerson Park: 0.9 mi
- Ivy Hill Park: 1.5 mi
- David Shaw Arboretum: 1.6 mi
- Japanese Themed Garden: 2.9 mi
- Bonsai Display: 2.9 mi
- Display Garden: 2.9 mi
- Composting Demo: 2.9 mi
- Radio Astronomy: 2.1 mi
- The Jansky Monument: 2.1 mi
- Karl Jansky Radio Astronomy Site: 2.1 mi
- Historic Public School Bell: 2.8 mi
- World War I Memorial: 3.0 mi
- Karl Jansky Monument: 2.1 mi
- Raritan Rocket: 3.0 mi
- COVID-19 Memorial Spiral: 3.4 mi
- Eagles: 4.3 mi
- Evil Clown of Middletown: 4.5 mi
- Tatum Park: 2.4 mi
- Bellhaven Nature Area: 6.2 mi
- Huber Woods County Park: 7.9 mi
- Mannino Park: 8.2 mi
- Mount Loretto Unique Area: 8.3 mi
- Cliffwood Beach: 4.6 mi
- Seidler's Beach: 4.9 mi
- Belvedero Beach: 5.2 mi
- Seidler Beach: 5.2 mi
- Ideal Beach: 5.4 mi
- Crawford Hill: 0.1 mi
- Telegraph Hill: 0.7 mi
- Beacon Hill: 2.3 mi
- Sugar Loaf Hill: 5.4 mi
- Garrett Hill: 5.7 mi
- Telegraph Hill Picnic Area: 0.9 mi
- Holy Trinity Picnic Site: 10.3 mi
- Thompson Grove Park: 12.9 mi
- Grove 4: 14.2 mi
- Grove 3B: 14.2 mi
- North Tower: 10.5 mi
- Twin Lights State Historic Site: 10.5 mi
- Power House: 10.5 mi
- South Tower: 10.5 mi
- Lighthouse Keeper's Quarters: 10.8 mi
- Fallkill Falls: 21.8 mi
- Binnen Falls: 22.0 mi
- Ambergill Falls: 22.0 mi
- Seele: 22.3 mi
- Buttermilk Falls: 23.8 mi
- Barber: 10.4 mi
- Raritan Landing: 16.8 mi
- Feltville Historic District: 22.7 mi
- Grover Cleveland Service Area: 12.2 mi
- Thomas Edison Service Area: 12.4 mi
- Molly Pitcher Service Area: 16.7 mi
- Hawk Hill: 24.9 mi
Summits around it
The highest named summits within 25 miles of Holmdel Horn Antenna. Elevation from each summit’s own record; bearing measured between the two coordinates.
| Summit | Bearing | Elevation | Distance |
|---|---|---|---|
| Second Watchung Mountain | NW 308° | 168 m | 24.2 mi |
| Todt Hill | NNE 14° | 125 m | 14.9 mi |
| Crawford Hill | NW 324° | 120 m | 0.1 mi |
| Pine Hill | SW 228° | 110 m | 16.2 mi |
| Telegraph Hill | ENE 68° | 106 m | 0.7 mi |
| Tenmile Run Mountain | W 277° | 92 m | 21.9 mi |
| Nook Hill | NNW 345° | 92 m | 24.7 mi |
| First Watchung Mountain | WNW 303° | 83 m | 23.9 mi |
When to go
Light through the year
| Date | Sunrise | Golden hour | Sunset |
|---|---|---|---|
| March equinox | 07:01 | 18:33 | 19:09 |
| June solstice | 05:28 | 19:50 | 20:31 |
| September equinox | 06:45 | 18:20 | 18:56 |
| December solstice | 07:17 | 15:51 | 16:34 |
Local time (America/New_York).
Climate normals
Months averaging 50–80 °F: Apr–Oct.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °F | 32 | 35 | 41 | 52 | 61 | 71 | 76 | 74 | 67 | 56 | 46 | 37 |
| Precip in | 3.9 | 3.1 | 4.2 | 3.8 | 3.8 | 4.4 | 4.7 | 4.1 | 4.2 | 4.1 | 3.5 | 4.7 |
1991–2020 U.S. Climate Normals, NOAA NCEI — Freehold-marlboro, 6 mi away.
Where this comes from
Location and category confirmed against OpenStreetMap.
National Register of Historic Places, reference 89002457OpenStreetMapWikipediaWikidataOpenStreetMap element node/5685585294
Day trips start here
- Keansburg · 5 mi
- Old Bridge · 6 mi
- Perth Amboy · 9 mi
- Freehold · 10 mi
- Englishtown · 11 mi
- East Brunswick · 12 mi
Take the scenic way to Holmdel Horn Antenna.
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