• ID
• comment_count
• comment_status
• filter
• guid
• menu_order
• ping_status
• pinged
• post_author
• post_content_filtered
• post_content
• post_date_gmt
• post_date
• post_excerpt
• post_mime_type
• post_modified_gmt
• post_modified
• post_name
• post_parent
• post_password
• post_status
• post_title
• post_type
• to_ping

References

developer.wordpress.org/reference/classes/wp_post