CXO

Chandra X-ray Observatory
(CXO or CXRO) satellite
(Advanced X-ray Astrophysics Facility
(AXAF) satellite)

CXO patch
satellitepatch

This page contains philatelic information on the Chandra X-ray Observatory (CXO or CXRO) / Advanced X-ray Astrophysics Facility (AXAF) satellite. Catalog numbers, years of issue, and notes on the satellites featured are given when available. If readers know of additional information or images, please contact the authors using the e-mail addresses at the bottom of this page.

CXO was named in honor of the Nobel Prize winning physicist S. Chandrasekhar (1910 - 1995).

CXO is one of four NASA "Great Observatories", along with the Hubble Space Telescope (HST), the Compton Gamma Ray Observatory (CGRO), and the Spitzer Space Telescope (SST).

Launch information
(found elsewhere)
Launch covers
(including anniversary-of-launch covers, and launch-related event covers)
(farther below)
Other postal items
(stamps, souvenir sheets, aerogrammes, postal cards, etc.)
(immediately below)
Chandra / CXO / AXAF Chandra / CXO / AXAF Chandra / CXO / AXAF
Chandra (on other than Chandra launch covers)


Below is a list of Chandra / CXO / AXAF satellite postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).

CountryCatalog NumberType of ItemYear of IssueNotes on Content
Chandra / CXO / AXAF
Antigua and Barbuda2244c (Mi2930)
i2244c
One of MS6 (2244 (a-f)) (Mi2928-2933)
One of imperforate MS6 (i2244 (a-f))
1999Hubble/HST (not Chandra/CXO/"AXAF", as in text)
Barbuda1791c (Mi2390)One of MS6 (1791 (a-f)) (Mi2388-2393), Antigua and Barbuda 2244c overprinted2000Hubble/HST (not Chandra/CXO/"AXAF", as in text)
Chad435 (Mi954A)
i435 (Mi954B)

Imperforate
1983(Probable) early-design Chandra/CXO1 (shown with Space Shuttle)
Chad435a (BL145A)
i435a (BL145B)
On stamp of SS1 (435)
On stamp of imperforate SS1 (i435)
Chad439b (Mi953A-958A)
i439b (Mi953B-958B)
On one of MS6 (434-439)
On one of imperforate MS6 (i434-i439)
Congo (People's Republic)582 (Mi807A)
i582 (Mi807B)

Imperforate
1981(Probable) early-design Chandra/CXO1 (shown with Space Shuttle Columbia)
Congo (People's Republic)582 dsImperforate deluxe sheet (582)
Congo (Democratic Republic)Mi2191A-2193A_ms3_vert
Mi2191B-2193B_ms3_vert
In (right) margin of MS3 (Mi2191A-2193A) vertical
In (right) margin of imperforate MS3 (Mi2191B-2193B) vertical
2013"Chandra"
Congo (Democratic Republic)Mi2191A-2193A_ms3_horiz
Mi2191B-2193B_ms3_horiz
In (right) margin of MS3 (Mi2191A-2193A) horizontal
In (right) margin of imperforate MS3 (Mi2191B-2193B) horizontal
Gambia2268f (Mi3703)One of MS6 (2268 (a-f))2000"Chandra"
Gambia2268f essayOne of MS6 (2268 imperforate essay (a-f))
Guinea Republic1936ab (BL_A655)
i1936ab
In (upper-left) margin of SS1 (1936a) (Mi3172)
In (upper-left) margin of imperforate SS1 (i1936a)
2001
Guinea Republic2224b (Mi4054)
i2224b
In (upper-right and lower-left) margins of MS4 (4x 2224)
In (upper-right and lower-left) margins of imperforate MS4 (4x i2224)
2003
Guinea Republic2224b fdcMS4 on FDC
Guinea Republic2225b (Mi4055)
i2225b
In (upper-right and lower-left) margins of MS4 (4x 2225)
In (upper-right and lower-left) margins of imperforate MS4 (4x i2225)
Guinea Republic2225b fdcMS4 on FDC
Guinea Republic2226b (Mi4056)
i2226b
In (upper-right and lower-left) margins of MS4 (4x 2226)
In (upper-right and lower-left) margins of imperforate MS4 (4x i2226)
Guinea Republic2226b fdcMS4 on FDC
Guinea Republic2227b (Mi4053)
i2227b
In (upper-right and lower-left) margins of MS4 (4x 2227)
In (upper-right and lower-left) margins of imperforate MS4 (4x i2227)
Guinea Republic2227b fdcMS4 on FDC
Guinea Republic2228a (BL815)
i2228a
In (upper-right) margin of SS1 (2228)
In (upper-right) margin of imperforate SS1 (i2228)
"Chandra X-ray" (Observatory)
Guinea Republic2228a fdcSS1 on FDC
Guinea Republic2228b (Mi4051)
i2228b
In (upper-right and lower-left) margins of MS4 (4x 2228)
In (upper-right and lower-left) margins of imperforate MS4 (4x i2228)
Guinea Republic2228b fdcMS4 on FDC
Guinea Republic2229b (Mi4052A)
i2229b (Mi4052B)
In (upper-right and lower-left) margins of MS4 (4x 2229)
In (upper-right and lower-left) margins of imperforate MS4 (4x i2229)
Guinea Republic2229b fdcMS4 on FDC
Guinea Republic2230b (Mi4049)
i2230b
In (upper-right and lower-left) margins of MS4 (4x 2230)
In (upper-right and lower-left) margins of imperforate MS4 (4x i2230)
Guinea Republic2230b fdcMS4 on FDC
Guinea Republic2231b (Mi4050)
i2231b
In (upper-right and lower-left) margins of MS4 (4x 2231)
In (upper-right and lower-left) margins of imperforate MS4 (4x i2231)
Guinea Republic2231b fdcMS4 on FDC
Guinea RepublicBL967A
BL967B
In (upper) margin of SS1
In (upper) margin of imperforate SS1
2006"Chandra X-ray" (Observatory)
Guinea RepublicBL967A fdcStamp on FDC
Guinea RepublicMi5841A
Mi5841B
One of MS6 (Mi5838A-5843A)
One of imperforate MS6 (Mi5838B-5843B)
2008
Guinea RepublicMi5838A-5843A_ms6 fdcMS6 on FDC
Guinea RepublicMi5845A-5850A_ms6 fdcCachet on FDC2008
Guinea RepublicBL1581A
BL1581B
On stamp of SS1
On stamp of imperforate SS1
2008"satellite Chandra"
Guinea RepublicBL1581A fdcSS1 on FDC
Liberia2514d (Mi5363-5365)
i2514d
MS6 (2x (2514 (a-c)))
Imperforate
2008"Chandra X-ray Observatory"
Liberia2517 (BL560)
i2517
SS1
Imperforate SS1
Maldive IslandsUnknown ss (BL?)In (lower) margin of SS12008"Chandra X-ray Observatory"
Maldive IslandsUnknown fdcSS1 and cachet on FDC
Maldive IslandsUnknown ss (BL?)In (upper-right) margin of SS12017"Chandra X-ray Observatory" (but unknown/fantasy depiction)
St. Thomas and Prince Islands3020 (BL1149)In (upper-right) margin of SS12015"Chandra"
Tuvalu1073 (Mi1472-1475)On all stamps and in (upper) margin of MS4 (1073 (a-d))2008"Chandra X-ray Observatory"
Tuvalu1073 fdcMS4 on FDC
United States1912 fdc (Mi1481 fdc)(ArtCraft) cachet on FDC1981(Probable) early-design Chandra/CXO1
United States1912+1915-1916+1919 fdc (Mi1481+1484-1485+1488 fdc)(ArtCraft) cachet (same) on FDC (different)
United States1915+1919 fdc (Mi1484+1488 fdc)(Space Voyage) cachet on FDC
United States1916 fdc (Mi1485 fdc)(ArtCraft) cachet on FDC
United States1919a fdc (Mi1481-1488 fdc)In lower right of (Artmaster) cachet on FDC
United StatesNoneCancel1999Shown with Space Shuttle Columbia ("STS-93")
United States3188e fdc (Mi3175 fdc)(Space Voyage) cachet on FDC1999Chandra / "STS-93"
United States3189i fdc (Mi3233 fdc)(Space Voyage) cachet on FDC1999
United States3190a fdc1 (Mi3243 fdc1)(Space Voyage) cachet (different color) on FDC2000
United States3190a fdc2 (Mi3243 fdc2)(Space Voyage) cachet (same) on FDC (different cancel)
United States3190a fdc3 (Mi3243 fdc3)(Space Voyage) cachet (different color) on FDC
United States3191h fdc (Mi3295 fdc)(Space Voyage) cachet (same) on FDC2000

1An astronomical/telescope satellite somewhat similar to Chandra/CXO/AXAF is shown in an early-design stage, most likely due to the pre-launch date of these items, when the design was not finalized. This design is similar to HST but has solar panels that are perpendicular, rather than parallel, to the spacecraft body.


Below is a list of Chandra / CXO / AXAF satellite launch covers (including anniversary-of-launch covers, and launch-related event covers).

CountryCancel DateCancel LocationType of ItemNotes on Content
1999-07-23: Chandra / CXO / AXAF (from STS-93)
United States1999-07-25Kennedy Space Center FL(Mission patch) cachet on coverChandra/CXO/AXAF (STS-93/Columbia) deployed
Chandra (on other than Chandra launch covers)
United States1983-01-31Cape Canaveral FL(Blue rubber-stamp) cachet on Explorer-1 anniversary cover(Probable) early-design Chandra/CXO1 (shown with Space Shuttle)
United States1986-01-12
1986-01-18
Cape Canaveral FL
Edwards AFB, CA
(Black printed) cachet on STS-32 (61C) launch and Satcom-Ku1 deployed
STS-32 (61C) landing cover
(Probable) early-design Chandra/CXO1 (shown with Space Shuttle)

1An astronomical/telescope satellite somewhat similar to Chandra/CXO/AXAF is shown in an early-design stage, most likely due to the pre-launch date of these items, when the design was not finalized. This design is similar to HST but has solar panels that are perpendicular, rather than parallel, to the spacecraft body.


Back to Astronomical/telescope satellites.
Back to Space Shuttle-related satellites.
Back to Un-Manned Satellite Philately.



Copyright © 2008-2018, Colorado State University. All rights reserved.
This Website created and maintained by Don Hillger and Garry Toth.
Updated: 2018-10-16