It seems like you're asking about the mass of an object on Neptune, but you're missing a crucial part of the question: the object's mass itself!

Here's why that matters:

* Mass is an intrinsic property: An object's mass stays the same regardless of where it is in the universe. A 1 kg object on Earth is still 1 kg on Neptune.

* Weight changes with gravity: What changes is an object's weight, which is the force of gravity acting on its mass. Neptune's gravity is stronger than Earth's, so a 1 kg object would weigh more on Neptune.

To find out what an object weighs on Neptune, you need to know its mass and use the following formula:

* Weight = Mass × Gravity

The gravitational acceleration on Neptune is approximately 11.15 m/s², which is about 1.14 times stronger than Earth's gravity.

Example:

Let's say you have a 10 kg object. Its weight on Neptune would be:

* Weight = 10 kg × 11.15 m/s² = 111.5 Newtons (N)

So, to answer your question, you need to tell me the mass of the object you're interested in. Then, I can calculate its weight on Neptune.