The transaction is valid. But there is a chance to get the coins back if you are the owner of the BTC wallet.

If you have access to the private keys of the BTC address, then you can generally create the same private key for a LTC wallet and access your LTC.

The procedure is different depending on what that BTC address is (HW wallet, desktop wallet, exchange address, ...). Google has many answers

If you don't own the BTC address, consider this an expensive lesson, sorry...

No...it's okay to comment such. Maybe an instance like this could help the LTC blockchain. Maybe the devs can create a program that if ever LTC will be sent to any other BTC/altcoin addresses (erroneous transaction) it will automatically comes back to the sender's wallet.

All other big coins have already rise significantly in last 2 days, so it won't take long before LTC will pump as well

Anyone having trouble with the daemon stopping?
I run a few of them at home so I can look at the block-chains - which also means I modify it a bit: I add 2 getblock functions.

If you owned Litecoin on May 12, 2014:  https://bt.irlbtc.com/view/1177746.msg12397182#msg12397182

I hope that Lightcoin will return to its historical highs faster than other coins, because it is an independent and strong coin

Does litecoin support Segwit addresses? I'm using the nano ledger to store mine and I tried sending some from an exchange to my ledger litecoin segwit address but it wouldn't because it was an unrecognised format. Can anyone help?

Litecoin this coin has been following BTC's great route, so if BTC is soaring, LTC can still lie in ambush before it pulls up.

i think you should read this
https://www.investinblockchain.com/lightning-network-bitcoin-scaling/
right now the most expensive transaction is bitcoin transaction but lite coin probably 3 cent fee on a $2000 transaction
also check this reddit post https://www.reddit.com/r/litecoin/comments/7oiqwx/ltc_faster_and_cheaper_to_transfer/