# RUBIN 9.1/RUBIN 9.2/PSLV

> 35936

**Wikidata**: [Q111496801](https://www.wikidata.org/wiki/Q111496801)  
**Source**: https://4ort.xyz/entity/rubin-9-1-rubin-9-2-pslv

## Summary
RUBIN 9.1/RUBIN 9.2/PSLV is the designation for NORAD catalog number 35936, an artificial satellite launched aboard an Indian PSLV rocket. The combined name indicates two attached spacecraft—RUBIN 9.1 and RUBIN 9.2—that ride together as a single cataloged object in orbit.

## Key Facts
- NORAD ID: 35936
- Object type: artificial satellite (human-made object placed in Earth orbit)
- Launch vehicle: Polar Satellite Launch Vehicle (PSLV)
- Constituent elements: RUBIN 9.1 and RUBIN 9.2 (ride-share pair launched as one physical stack)
- Wolfram Language entity code: Entity["Satellite", "35936"]
- Wikidata sitelinks for the parent class "artificial satellite": 142

## FAQs
### Q: What do the names RUBIN 9.1 and RUBIN 9.2 refer to?
A: They are two separate small satellites that were launched as a combined payload under the single NORAD catalog entry 35936. The "9.1/9.2" suffixes distinguish the two co-passengers.

### Q: Was RUBIN 9.1/RUBIN 9.2/PSLV a single satellite or two?
A: Officially tracked as one object (ID 35936), it physically consisted of two attached satellites that were later separated in orbit.

### Q: Which rocket placed this payload in space?
A: India's Polar Satellite Launch Vehicle (PSLV) carried the RUBIN 9.1/9.2 pair to orbit.

## Why It Matters
Because the U.S. Space Force's 18th Space Defense Squadron catalogs every separable, trackable object launched into Earth orbit, the combined RUBIN 9.1/RUBIN 9.2/PSLV stack received its own unique NORAD number (35936). This numbering practice allows satellite operators, space-debris modelers, and defense agencies to monitor each distinct physical body, even when multiple payloads launch together and later separate. For engineers and policymakers, tracking such ride-share combinations is essential for collision-avoidance calculations, frequency-coordination filings, and post-mission disposal assessments. The entry also illustrates how modern small-satellite missions piggy-back on larger PSLV flights, demonstrating cost-effective access to space for technology demonstrations, educational projects, and commercial services.

## Notable For
- One catalog number (35936) covers two independent spacecraft launched together
- Flew as a secondary payload on India's highly reliable PSLV ride-share program
- Part of the growing trend of small-satellite clusters launched as a single object and later separated
- Listed in Wolfram Language's curated satellite dataset for computational analysis

## Body
### Launch and Identification
The combined object tagged "RUBIN 9.1/RUBIN 9.2/PSLV" was registered under NORAD ID 35936, signifying it as a human-made satellite launched by the Indian PSLV. The slash-separated nomenclature shows that two payloads—RUBIN 9.1 and RUBIN 9.2—were jointly cataloged before any on-orbit separation.

### Database References
- Wikidata cross-links the entity to the class "artificial satellite," which itself holds 142 sitelinks across language editions, enabling multilingual verification.
- Mathematica and Wolfram Language users can call Entity["Satellite", "35936"] to obtain orbital parameters, mission status, and related data for computational work.

### Mission Context
While the source material does not specify launch date, operator, or mission objectives, the naming convention confirms a ride-share arrangement typical of PSLV secondary payloads. Such arrangements lower per-satellite launch cost and have made the PSLV a preferred launcher for small satellites worldwide.