Nonprofit · EIN 83-3364739
INTERNATIONAL DARK SKY DISCOVERY CENTER INC
Tax-exempt · FOUNTAIN HLS, AZ 85268
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $9,077,577 | $312,309 | $8,765,268 | $28,021,502 | $99,941 | $27,921,561 |
| December 31, 2024 | 990 | $13,359,332 | $54,725 | $13,304,607 | $19,170,093 | $12,507 | $19,157,586 |
| December 31, 2023 | 990 | $1,902,160 | $25,851 | $1,876,309 | $10,862,120 | $5,008,641 | $5,853,479 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $8,797,166
- of which government grants
- $3,301,500
- Membership dues
- $4,668
- Program service revenue
- $0
- Investment income
- $271,060
- Other revenue
- $9,351
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $0
- Other salaries and wages
- $152,082
- Salaries, compensation and benefits (total)
- $170,281
- Professional fundraising fees
- $0
- Legal fees
- $1,958
- Accounting fees
- $1,630
- Occupancy
- $40,930
- Travel
- $221
- Management and general (functional)
- $298,097
- Fundraising (functional)
- $14,212
Balance sheet and other
- Total assets, start of year
- $19,170,093
- Total assets, end of year
- $28,021,502
- Total liabilities, end of year
- $99,941
- Net assets, end of year
- $27,921,561
- Land, buildings and equipment
- $19,625,152
- Net assets without donor restrictions
- $27,921,561
- Gross receipts
- $9,077,577
- Employees
- 3
- Volunteers
- 0
- Year formed
- 2019
- State of legal domicile
- AZ
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990 for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Scott Adams | Board Member Trustee or director | 10 | $0 |
| Vicky Derksen | Board Member Trustee or director | 5 | $0 |
| Walt Franklin | Board Member Trustee or director | 3 | $0 |
| Tony Pistilli | Board Member Trustee or director | 25 | $0 |
| Ted Blank | Board Member Trustee or director | 20 | $0 |
| Joe Bill | President Trustee or director | 50 | $0 |
| Nancy Bill | Treasurer Trustee or director | 40 | $0 |
| April Sessner | Secretary Trustee or director | 3 | $0 |
| Geoff Yazzetta | Board Member Trustee or director | 5 | $0 |
| John Craft | Vice President Trustee or director | 10 | $0 |
| Bruce Kosaveach | Board Member Trustee or director | 10 | $0 |
| Nancy Schneider | Board Member Trustee or director | 16 | $0 |
| Nick Proctor | Board Member Trustee or director | 5 | $0 |
990 for the year ended December 31, 2024: 16 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Scott Adams | Board Member Trustee or director | 8 | $0 |
| Jerry Butler | Board Member Trustee or director | 20 | $0 |
| Vicky Derksen | Board Member Trustee or director | 6 | $0 |
| Walt Franklin | Board Member Trustee or director | 3 | $0 |
| Alan Magazine | Board Member Trustee or director | 3 | $0 |
| Tony Pistilli | Board Member Trustee or director | 14 | $0 |
| Ted Blank | Board Member Trustee or director | 12 | $0 |
| Joe Bill | President Trustee or director, Officer | 45 | $0 |
| Jeff Esposito | Board Member Trustee or director | 9 | $0 |
| Nancy Bill | Treasurer Trustee or director, Officer | 40 | $0 |
| April Sessner | Secretary Trustee or director, Officer | 4 | $0 |
| Geoff Yazzetta | Board Member Trustee or director | 3 | $0 |
| John Craft | Vice President Trustee or director, Officer | 8 | $0 |
| Bruce Kosaveach | Board Member Trustee or director | 10 | $0 |
| Nancy Schneider | Board Member Trustee or director | 2 | $0 |
| James Wilson | Vice President Trustee or director, Officer | 10.5 | $0 |
990 for the year ended December 31, 2023: 13 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Scott Adams | Board Member Trustee or director | 8 | $0 |
| Jerry Butler | Board Member Trustee or director | 15 | $0 |
| Vicky Derksen | Board Member Trustee or director | 10 | $0 |
| Walt Franklin | Board Member Trustee or director | 3 | $0 |
| Alan Magazine | Board Member Trustee or director | 1 | $0 |
| Tony Pistilli | Board Member Trustee or director | 10 | $0 |
| Ted Blank | Board Member Trustee or director | 15 | $0 |
| Chandra Merica | Board Member Trustee or director | 4 | $0 |
| Joe Bill | President Trustee or director, Officer | 40 | $0 |
| Jeff Esposito | Vice-President Trustee or director, Officer | 20 | $0 |
| Nancy Bill | Treasurer Trustee or director, Officer | 35 | $0 |
| April Sessner | Secretary Trustee or director, Officer | 2 | $0 |
| Geoff Yazzetta | Board Member Trustee or director | 4 | $0 |
Address and contacts
- Address (IRS master file)
- 12845 N LA MONTANA DR, FOUNTAIN HLS, AZ 85268-0019
- In care of
- % JOE BILL
- Principal officer (990 for 2025)
- Nancy Bill, 12240 N Barrel Cactus Way, Fountain Hills, AZ 85268
- Signed the 990
- Nancy Bill, Treasurer
- Phone
- (480) 353-8044
- Website
- www.darkskycenter.org
Mission
To be the world's center for providing STEM science-based education about the relationship between dark sky preservation, astronomy, space science, and sustainable life on earth.
Program accomplishments
- None.0
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 83-3364739
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (170(b)(1)(A)(vi))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2019
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Philanthropy, voluntarism and grantmaking foundations (T50)
- Assets (IRS master file)
- $28,021,502
- Income (IRS master file)
- $9,077,577
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $9,077,577 | $312,309 | $28,021,502 | IRS |
| 990 | December 2024 | $13,359,332 | $54,725 | $19,170,093 | IRS |
| 990 | December 2023 | $1,902,160 | $25,851 | $10,862,120 | XML |
| 990 | December 2022 | $3,609,668 | $62,062 | $5,194,158 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
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 83-3364739).
Questions about INTERNATIONAL DARK SKY DISCOVERY CENTER INC
- What is the EIN of INTERNATIONAL DARK SKY DISCOVERY CENTER INC?
- The employer identification number (EIN) of INTERNATIONAL DARK SKY DISCOVERY CENTER INC is 83-3364739.
- Is INTERNATIONAL DARK SKY DISCOVERY CENTER INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2019.
- Are donations to INTERNATIONAL DARK SKY DISCOVERY CENTER INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL DARK SKY DISCOVERY CENTER INC file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of INTERNATIONAL DARK SKY DISCOVERY CENTER INC due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did INTERNATIONAL DARK SKY DISCOVERY CENTER INC last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of INTERNATIONAL DARK SKY DISCOVERY CENTER INC?
- The 990 for the year ended December 31, 2025 names Nancy Bill.
- Who are the officers and directors of INTERNATIONAL DARK SKY DISCOVERY CENTER INC?
- The 990 for the year ended December 31, 2025 lists 13 people; 0 received compensation from the organization.
- How much revenue does INTERNATIONAL DARK SKY DISCOVERY CENTER INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $9,077,577, expenses of $312,309 and total assets of $28,021,502 at year end.
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