Yes. Yes. So Jason, so yes, I should have been more clear. So the 42% applies to all the backlog. So it's not specific to launch, horsepase system. So it's a total business. And as far as the book-to-bill target, now you're right, of course, everybody -- we need to see a book-to-bill greater than 1, just given kind of what our growth aspirations are. I think that when you see that we've got backlog over $1 billion against a street consensus number that's obviously significantly lower than that. We've got quite a bit of ability to grow significantly based off of just the backlog that we have in place.
But we're -- we continue to chase big deals. I think that's the one thing that's really evolved over the course of the last 12 months. And I think largely not -- I would say not disconnected at all from what we've seen, like, for example, landing that large SDA contract is that kind of as we start to get more and more of these super sophisticated programs, one, we seem to attract more of those kind of opportunities as well.
So I think you'll continue to see us chasing big deals on the Space Systems side. I mean the component business continues to grow nicely, and that's great because of the margin profile that some of those businesses have by selling components into the merchant market.
But I think that what we see are large program opportunities to continue to build the backlog, not to dissimilar to what happened with the FDA beta contract. But also as Neutron becomes closer and closer to its first launch, that's where -- that's a very chunky opportunity as we kind of -- as we sign LSAs for that vehicle, those are all needle moving, given the average selling price that we expect to realize from a neutron launch.
So I think the -- you'll see and we talked about this last year as we progressed through 2023, is that when people kind of looked and said, "Hey, it looks like your backlog growth has stalled a bit. And what does that mean for future growth. We said, look, you have to be patient because the kind of opportunities that we're chasing are just such a scale and complexity that they don't come together on a predictable kind of programmatic way, they come in fits and starts. And I think we saw that again late last year with the FDA contract coming into focus. And then I believe you'll see similar things as far as program size and then again, across not only Space Systems, but also including Neutron.
So I think that you're right, it's right for people to expect a book to bill greater than 1. I have no concerns similar to Pete said that's of the things that I sit up at night worrying about, that's also not one of them.