page_title: Oka (river)
section_title: Main tributaries
hierarchical_section_title: Oka (river) / Main tributaries
caption_attribution_description: English: View to the Oka River from Konstantinovo village, Ryazan Oblast, Russia Русский: Вид на Оку с высокого берега в селе Константиново в Рыбновском районе Рязанской области
context_page_description: The Oka is a river in central Russia, the largest right tributary of the Volga. It flows through the regions of Oryol, Tula, Kaluga, Moscow, Ryazan, Vladimir and Nizhny Novgorod and is navigable over a large part of its total length, as far upstream as to the town of Kaluga. Its length is 1,500 km and its catchment area is 245,000 km². The Russian capital Moscow sits on one of the Oka's tributaries—the Moskva.
context_section_description: The largest tributaries of the Oka are, from source to mouth:
  Zusha (right)
  Upa (right)
  Zhizdra (left)
  Ugra (left)
  Protva (left)
  Nara (left)
  Lopasnya (left)
  Besputa (right)
  Osyotr (right)
  Moskva (left)
  Vozha (right)
  Pronya (right)
  Para (right)
  Pra (left)
  Gus (left)
  Moksha (right)
  Tyosha (right)
  Ushna (left)
  Kishma (right)
  Klyazma (left)
caption: The Oka in Ryazan Oblast, near Rybnoye
exif: {"Image ImageWidth": "5184", "Image ImageLength": "3456", "Image BitsPerSample": "[16, 16, 16]", "Image Compression": "Uncompressed", "Image PhotometricInterpretation": "2", "Image Make": "Canon", "Image Model": "Canon EOS 550D", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image XResolution": "300", "Image YResolution": "300", "Image PlanarConfiguration": "1", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS6 (Windows)", "Image DateTime": "2013:07:10 19:15:42", "Image Artist": "A.Savin", "Image Copyright": "Licensed under the terms of CC-BY-SA 3.0/FAL", "Image ExifOffset": "376", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1002", "Thumbnail JPEGInterchangeFormatLength": "8284", "EXIF ExposureTime": "1/400", "EXIF FNumber": "10", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "100", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2013:06:20 13:07:12", "EXIF DateTimeDigitized": "2013:06:20 13:07:12", "EXIF ShutterSpeedValue": "540241/62500", "EXIF ApertureValue": "415241/62500", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF MeteringMode": "Pattern", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "24", "EXIF SubSecTime": "75", "EXIF SubSecTimeOriginal": "75", "EXIF SubSecTimeDigitized": "75", "EXIF ColorSpace": "Uncalibrated", "EXIF ExifImageWidth": "4836", "EXIF ExifImageLength": "3016", "EXIF FocalPlaneXResolution": "1036800/181", "EXIF FocalPlaneYResolution": "691200/119", "EXIF FocalPlaneResolutionUnit": "2", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard", "EXIF BodySerialNumber": "1131507331", "EXIF LensSpecification": "[17, 50, 0/0, 0/0]", "EXIF LensModel": "17-50mm"}