Explorer 4

Summary

Explorer 4 is a research satellite^[1]. It draws 43 Wikipedia views per month (research_satellite category, ranking #7 of 47).^[2]

Key Facts

• Explorer 4's image is recorded as Explorer4 instruments.png^[3].
• Explorer 4's instance of is recorded as research satellite^[4].
• Explorer 4's COSPAR ID is recorded as 1958-005A^[5].
• Explorer 4's Commons category is recorded as Explorer 4^[6].
• Explorer 4's space launch vehicle is recorded as Juno I^[7].
• Explorer 4's SCN is recorded as 00009^[8].
• Explorer 4's parent astronomical body is recorded as Earth^[9].
• Explorer 4's UTC date of spacecraft launch is recorded as +1958-07-26T00:00:00Z^[10].
• Explorer 4's time of object orbit decay is recorded as +1959-10-23T00:00:00Z^[11].
• Explorer 4's Freebase ID is recorded as /m/0130pl^[12].
• Explorer 4's significant event is recorded as rocket launch^[13].
• Explorer 4's orbital eccentricity is recorded as {'amount': '+0.127936'}^[14].
• Explorer 4's start point is recorded as Cape Canaveral Launch Complex 5^[15].
• Explorer 4's orbital inclination is recorded as {'unit': 'Q28390', 'amount': '+50.3'}^[16].
• Explorer 4's mass is recorded as {'unit': 'Q11570', 'amount': '+25.5'}^[17].
• Explorer 4's orbital period is recorded as {'unit': 'Q7727', 'amount': '+110.2'}^[18].
• Explorer 4's semi-major axis of an orbit is recorded as {'unit': 'Q828224', 'amount': '+7616.2'}^[19].
• Explorer 4's apoapsis is recorded as {'unit': 'Q828224', 'amount': '+2213'}^[20].
• Explorer 4's periapsis is recorded as {'unit': 'Q828224', 'amount': '+263'}^[21].
• Explorer 4's Wolfram Language entity code is recorded as Entity["Satellite", "00009"]^[22].

Why It Matters

Explorer 4 draws 43 Wikipedia views per month (research_satellite category, ranking #7 of 47).^[2] It has Wikipedia articles in 14 language editions, a strong signal of global cultural recognition.^[23]