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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 23-7281900

DELAWARE ASTRONOMICAL SOCIETY

Tax-exempt · GREENVILLE, DE 19807

Address and contacts

Address (IRS master file)
1610 HILLSIDE MILL RD, GREENVILLE, DE 19807-1904
Mailing address (990-N for 2025)
1610 Hillside Mill Road, Greenville DE 19807
Principal officer (990-N for 2025)
Robert Trebilcock, 1702 Half Mile Post S, Garnet Valley PA 19060

What it must file and when

IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. Its accounting year ends in August, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025August 31, 2026January 15, 2027990-N on file
2024August 31, 2025January 15, 2026990-N on file
2023August 31, 2024January 15, 2025990-N on file

File the 2026 990-N for DELAWARE ASTRONOMICAL SOCIETY

Due January 18, 2028 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
23-7281900
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (509(a)(2))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
1973
Accounting year ends
August
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Robert Trebilcock
August 31, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Robert Trebilcock
August 31, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Robert Trebilcock
August 31, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Robert Trebilcock
August 31, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Robert Trebilcock
August 31, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Robert Trebilcock
August 31, 2020≤ $50,000 receipts––e-Postcard

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 23-7281900).

Questions about DELAWARE ASTRONOMICAL SOCIETY

What is the EIN of DELAWARE ASTRONOMICAL SOCIETY?
The employer identification number (EIN) of DELAWARE ASTRONOMICAL SOCIETY is 23-7281900.
Is DELAWARE ASTRONOMICAL SOCIETY tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1973.
Are donations to DELAWARE ASTRONOMICAL SOCIETY tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does DELAWARE ASTRONOMICAL SOCIETY file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of DELAWARE ASTRONOMICAL SOCIETY due?
The return for tax year 2026 (the year ending August 31, 2027) is due January 18, 2028. Form 8868 extends it by six months; the 990-N cannot be extended.
When did DELAWARE ASTRONOMICAL SOCIETY last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended August 31, 2026.
Who is the principal officer of DELAWARE ASTRONOMICAL SOCIETY?
The 990-N for 2025 names Robert Trebilcock.

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